Department of Electrical, Electronic and Computer Engineering, University of FukuiSPINTRONICS LAB. (GOTO LAB.)

日本語

Research

Introduction

Electrons in materials have the properties of "charge" and "spin", and the technological field that skillfully combines these properties is called spintronics. Devices using spin are expected to have a variety of applications, such as sensors that detect minute magnetic fields, low-power nonvolatile memories, and communication devices. Recently, research on artificial intelligence and non-Neumann type computers using spin is also progressing. Highly efficient spin control is essential for operating such devices. Spin can be controlled not only by electric charge but also by various physical phenomena such as heat, microwaves, strain, and mechanical motion. We aim to understand these physical phenomena and create spin devices with new functions.

Heat-driven spin control

Highly efficient spin control is extremely important in spin devices. One of the control methods is heat. When heat is applied to spins, the magnetic properties change due to temperature changes, which can be used to control spins [1]. This effect is large and led to the discovery of various new phenomena. Thermal resistance at the interface between the metal magnet and the insulator is important for highly efficient thermal control, and we are also conducting research on further improving efficiency using such thermal resistance.
[1] M. Goto, et al., Nat. Nanotechnol, Vol.14, 40.40~43, (2018),

Microwave spin devices

Spin has a resonant frequency in microwave, which is the communication frequency, thus it is also expected to be used as a communication device. One of these studies is research on diode sensitivity, which is the performance of microwave devices. Until now, bolometers have been known to convert electromagnetic waves into heat and detect them with high sensitivity in the infrared region, but in the sub-gigahertz band, there were no elements with the same diode sensitivity as bolometers. By utilizing the heat inside a nanoscale magnet, we succeeded in detecting sub-gigahertz microwaves at room temperature with diode sensitivity comparable to that of a bolometer [2]. This is expected to become a fundamental technology for microwave communication devices in the sub-gigahertz band.
[2] M. Goto, et al., Nat. Commun, Vol.12, 536 .1-7, (2021),

Non-conventional spin devices using thermal fluctuation

Cells and the molecules within them move with very little energy by utilizing thermal fluctuations at room temperature. This thermal fluctuation causes Brownian motion of molecules and fine particles, which causes particles to move randomly without applying any external energy. A computer that operates using Brownian motion is called a Brownian computer, and it is expected to be the key to realizing the ultimate low power consumption technology. Brownian motion is a phenomenon mainly observed in fine particles in liquids, but in magnetic materials, Brownian motion of skyrmion also occur in solid devices at room temperature [3]. A skyrmion is a particle-like spin structure in a magnetic thin film in which the magnetic poles are oriented in opposite directions in specific regions. If a circuit using skyrmion Brownian motion can be implemented, it is expected to become a fundamental technology for ultra-low power consumption.
[3] M. Goto, et al., J. Magn. Magn. Mater, Vol.536, 167974 .1-5, (2021),

Facility

Omnidirectional magnetic field prober

In-plane magnetic field prober

Magnetic field annealing equipment

Vibrating Sample Magnetometer

Publications

Publications

Publications (Excepting conference papers)
  1. M. Kasagawa, S. Miki, K. T. Hashimoto, A. Shimmura, R. Ishikawa, Y. Shiota, M. Goto, H. Nomura, and Y. Suzuki, "Hysteresis-free voltage gating of the skyrmion", Appl. Phys. Lett, Vol.124, 122407.1-6, (2024),
    https://pubs.aip.org/aip/apl/article/124/12/122407/3275790/Hysteresis-free-voltage-gating-of-the-skyrmion
  2. T. Watanabe, M. Goto, Y. Ando, T. Watakabe, H. Nomura and Y. Suzuki, "Magnetoresistance ratio in magnetic tunnel junction with silicon diffused MgO barrier", Appl. Phys. Express, Vol.17, 013001., (2024),
    https://iopscience.iop.org/article/10.35848/1882-0786/ad0ba1
  3. S. Miki, K. Hashimoto, J. Cho, J. Jung, C. Y. You, R. Ishikawa, E. Tamura, H. Nomura, M. Goto, and Y. Suzuki, "Spatial Control of Skyrmion Stabilization Energy by Low-Energy Ga+ Ion Implantation", Appl. Phys. Lett, Vol.122, 202401., (2023),
    https://pubs.aip.org/aip/apl/article-abstract/122/20/202401/2890515/Spatial-control-of-skyrmion-stabilization-energy?redirectedFrom=fulltext
  4. R. Ishikawa, M. Goto, H. Nomura, and Y. Suzuki, "Controlling the creation/annihilation and distribution of magnetic skyrmions by manipulating an externally applied voltage", Appl. Phys. Lett, Vol.121, 252402.1-5, (2022),
    https://aip.scitation.org/doi/10.1063/5.0128385
  5. Y. Kaneda, M. Goto, T. Mizuno, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, J. Urabe, S. Hara, H.Nomura, and Y. Suzuki, "Bi-stable toggle switching in magnetic tunnel junctions using sub-nanosecond Joule heat pulses", Jpn. J. Appl. Phys, Vol.61, 040905.1-5, (2022),
    https://iopscience.iop.org/article/10.35848/1347-4065/ac4c4f
  6. K. Hon, K. Takahashi, K. Enju, M. Goto, Y. Suzuki, and H. Nomura, "Numerical simulation of reservoir computing with magnetic nanowire lattices without inversion symmetry", Appl. Phys. Lett, Vol.120, 022404 .1-5, (2022),
    https://aip.scitation.org/doi/full/10.1063/5.0073465
  7. M. Goto, R. Kobayashi, R. Okuno, T. Mizuno, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Junction size dependence of the heat controlled magnetic anisotropy in magnetic tunnel junctions ", Appl. Phys. Express, Vol.15, 013001 .1-4, (2021),
    https://iopscience.iop.org/article/10.35848/1882-0786/ac3faf
  8. S. Miki, E. Tamura H. Nomura M. Goto and Y. Suzuki, "Size-independent drive of one-dimensional skyrmion motion using exchange energy control", J. Phys. Soc. Jpn, Vol.90, 114703 .1-6, (2021),
    https://journals.jps.jp/doi/10.7566/JPSJ.90.114703
  9. S. Miki, Y. Jibiki, E. Tamura, M. Goto, M. Oogane, J. Cho, R. Ishikawa, H. Nomura, and Y. Suzuki, "Brownian Motion of Magnetic Skyrmions in One- and Two-Dimensional Systems", J. Phys. Soc. Jpn, Vol.90, 083601.1-5, (2021),
    https://journals.jps.jp/doi/full/10.7566/JPSJ.90.083601
  10. N. Yamashita, S. Lee, R. Ohshima, E. Shigematsu, H. Koike, Y. Suzuki, S. Miwa, M. Goto, Y. Ando and M. Shiraishi, "Investigation of the thermal tolerance of silicon‑based lateral spin valves", Sci. Rep, Vol.11, 10583.1-9, (2021),
    https://www.nature.com/articles/s41598-021-90114-9
  11. R. Ishikawa, M. Goto, H. Nomura, and Y. Suzuki, "Implementation of skyrmion cellular automaton using Brownian motion and magnetic dipole interaction", Appl. Phys. Lett, Vol.119, 072402 .1-5, (2021),
    https://aip.scitation.org/doi/10.1063/5.0053797
  12. S. Lee, H. Koike, M. Goto, S. Miwa, Y. Suzuki, N. Yamashita, R. Ohshima, E. Shigematsu, Y. Ando and M. Shiraishi, "Synthetic Rashba spin-orbit system using a silicon metal-oxide semiconductor", Nat. Mater, Vol.20, 1228 .1228-1232, (2021),
    https://www.nature.com/articles/s41563-021-01026-y
  13. Y. Yamada, M. Goto, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, T. Mizuno, J. Urabe, S. Hara, S. Miwa, and Y. Suzuki, "Quasi-maser operation using magnetic tunnel junctions", Appl. Phys. Lett, Vol.118, 192402 .1-5, (2021),
    https://aip.scitation.org/doi/10.1063/5.0050151
  14. M. Goto, H. Nomura, and Y. Suzuki, "Stochastic skyrmion dynamics under alternating magnetic fields", J. Magn. Magn. Mater, Vol.536, 167974 .1-5, (2021),
    https://www.sciencedirect.com/science/article/pii/S030488532100250X?via%3Dihub
  15. K. Hon, Y. Kuwabiraki, M. Goto, R. Nakatani, Y. Suzuki, and H. Nomura, "Numerical simulation of artificial spin ice for reservoir computing", Appl. Phys. Express, Vol.14, 033001 .1-5, (2021),
    https://iopscience.iop.org/article/10.35848/1882-0786/abdcd8
  16. M. Goto, Y. Yamada, A. Shimura, T. Suzuki, N. Degawa, T. Yamane, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Uncooled sub-GHz spin bolometer driven by auto-oscillation", Nat. Commun, Vol.12, 536 .1-7, (2021),
    https://www.nature.com/articles/s41467-020-20631-0
  17. Y. Tanaka, M. Goto, A. K. Shukla, K. Yoshikawa, H. Nomura, S. Miwa, S. Tomishima, and Y. Suzuki, "Physically Unclonable Functions with Voltage-Controlled Magnetic Tunnel Junctions", IEEE. Trans. Magn, Vol.57, 3400806 .1-6, (2021),
    https://ieeexplore.ieee.org/document/9281316
  18. T. N. Anh Nguyen, Q. N. Pham, D. D. Lam, K. T. Do, T. H. Nguyen, H. K. Vu, D. L. Vu, M. Goto, M. Fukumoto, T. Watakabe, R. Okuno, S. Hasebe, H. Tomita, Y. Suzuki, H. Kubota, A. Fukushima, and K. Yakushiji, "Low frequency 1/f noise in deep submicron-sized magnetic tunnel junctions ", J. Appl. Phys, Vol.129, 024503 .1-7, (2020),
    https://aip.scitation.org/doi/10.1063/5.0013789
  19. J. Cho, E. Tamura, C. Liu, S. Miki, C.-Y. You, J.-S. Kim, H. Nomura, M. Goto, R. Nakatani and Y. Suzuki, "Manipulating 1-dimensional skyrmion motion by the external magnetic field gradient", New. J. Phys, Vol.22, 103053 .1-9, (2020),
    https://iopscience.iop.org/article/10.1088/1367-2630/abbead
  20. R. Miyakaze, S. Sakamoto, T. Kawabe, T. Tsukahara, Y. Kotani, K. Toyoki, T. Nakamura, M. Goto, Y. Suzuki, and S. Miwa, "Voltage-controlled magnetic anisotropy in an ultrathin nickel film studied by operando x-ray magnetic circular dichroism spectroscopy", Phys. Rev. B, Vol.102, 014419 .1-6, (2020),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.102.014419
  21. F. Bonell, M. Goto, G. Sauthier, J. F. Sierra, A. I. Figueroa, M. V. Costache, S. Miwa, Y. Suzuki, and S. O. Valenzuela, "Control of Spin − Orbit Torques by Interface Engineering in Topological Insulator Heterostructures", Nano. Lett, Vol.20, 5893 .5893-5899, (2020),
    https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.0c01850
  22. N. Yamashita, S. Lee, R. Ohshima, E. Shigematsu, H. Koike, Y. Suzuki, S. Miwa, M. Goto, Y. Ando, and M. Shiraishi, "Enhancement of spin signals by thermal annealing in silicon-based lateral spin valves", AIP. Adv, Vol.10, 095021 .1-6, (2020),
    https://aip.scitation.org/doi/10.1063/5.0022160
  23. Y. Jibiki, M. Goto, E. Tamura, J. Cho, S. Miki, R. Ishikawa, H. Nomura, T. Srivastava, W. Lim, S. Auffret, C. Baraduc, H. Bea, and Y. Suzuki, "Skyrmion Brownian Circuit Implemented in Continuous Ferromagnetic Thin Film", Appl. Phys. Lett, Vol.117, 082402 .1-5, (2020),
    https://aip.scitation.org/doi/10.1063/5.0011105
  24. H. Koike, S. Lee, R. Ohshima, E. Shigematsu, M. Goto, S. Miwa, Y. Suzuki, T. Sasaki, Y. Ando, and M. Shiraishi, "Over 1% magnetoresistance ratio at room temperature in non-degenerate silicon-based lateral spin valves", Appl. Phys. Express, Vol.13, 083002.1-4, (2020),
    https://iopscience.iop.org/article/10.35848/1882-0786/aba22c
  25. R. Okuno, Y. Yamada, M. Goto, T. Mizuno, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Enhanced electric control of magnetic anisotropy via high thermal resistance capping layers in magnetic tunnel junctions", J. Phys. : Condens. Matter Vol.32, 384001 .1-6 , (2020),
    https://iopscience.iop.org/article/10.1088/1361-648X/ab94f3
  26. R. Ishihara, Y. Ando, S. Lee, R. Ohshima, M. Goto, S. Miwa, Y. Suzuki, H. Koike, and M. Shiraishi, "Gate-Tunable Spin XOR Operation in a Silicon-Based Device at Room Temperature", Phys. Rev. Appl, Vol.13, 044010 .1-9 , (2020),
    https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.13.044010
  27. H. Nomura, T. Furuta, K. Tsujimoto, Y. Kuwabiraki, N. Samura, E. Tamura, M. Goto, R. Nakatani, H. Kubota and Y. Suzuki, "Randomly generated node-state-update procedure for dipole-coupled magnetic reservoir computing with voltage control of the magnetism", J. Phys. D: Appl. Phys, Vol.53, 094001 .1-8, (2019),
    https://iopscience.iop.org/article/10.1088/1361-6463/ab5a27
  28. S. Lee, F. Rortais, R. Ohshima, Y. Ando, M. Goto, S. Miwa, Y. Suzuki, H. Koike, and M. Shiraishi, "Investigation of gating effect in Si spin MOSFET", Appl. Phys. Lett, Vol.116, 022403 .1-5 , (2020),
    https://aip.scitation.org/doi/10.1063/1.5131823
  29. H. Nomura, K. Tsujimoto, M. Goto, N. Samura, R. Nakatani, and Y. Suzuki, "Reservoir computing with two-bit input task using dipole-coupled nanomagnet array", Jpn. J. Appl. Phys, Vol.59, SEEG02 .1-4 , (2019),
    https://iopscience.iop.org/article/10.7567/1347-4065/ab4f0f/meta
  30. J. Suwardy, M. Goto, Y. Suzuki, and S. Miwa, "Voltage-controlled magnetic anisotropy and Dzyaloshinskii − Moriya interactions in CoNi/MgO and CoNi/Pd/MgO", Jpn. J. Appl. Phys, Vol.58, 060917.1~4, (2019),
    https://iopscience.iop.org/article/10.7567/1347-4065/ab21a6
  31. H. Nomura, T. Furuta, K. Tsujimoto, Y. Kuwabiraki, F. Peper, E.Tamura, S. Miwa, M. Goto, R. Nakatani, and Y. Suzuki, "Reservoir computing with dipole-coupled nanomagnets", Jpn. J. Appl. Phys, Vol.58, 070901.1~5, (2019),
    https://iopscience.iop.org/article/10.7567/1347-4065/ab2406/meta
  32. S. Miwa, T. Nozaki, M. Tsujikawa, M. Suzuki, T. Tsukahara, T. Kawabe, Y. Kotani, K. Toyoki, M. Goto, T. Nakamura, M. Shirai, S. Yuasa, and Y. Suzuki, "Microscopic origin of large perpendicular magnetic anisotropy in an FeIr / MgO system", Phys. Rev. B, Vol.99, 184421.1~7, (2019),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.99.184421
  33. Y. Jibiki, M. Goto, M. Tsujikawa, P. Risius, S. Hasebe, X. Xu, K. Nawaoka, T. Ohkubo, K. Hono, M. Shirai, S. Miwa, and Y. Suzuki, "Interface resonance in Fe/Pt/MgO multilayer structure with large voltage controlled magnetic anisotropy change", Appl. Phys. Lett, Vol.114, 082405.1~5, (2019),
    https://aip.scitation.org/doi/10.1063/1.5082254
  34. T. Nozaki, Y. Jibiki, M. Goto, E. Tamura, T. Nozaki, H. Kubota, A. Fukushima, S. Yuasa, and Y. Suzuki, "Brownian motion of skyrmion bubbles and its control by voltage applications", Appl. Phys. Lett, Vol.114, 012402.1~5, (2019),
    https://aip.scitation.org/doi/10.1063/1.5070101
  35. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, N. Strelkov, B. Dieny, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, "Microwave amplification in a magnetic tunnel junction induced by heat-to-spin conversion at the nanoscale", Nat. Nanotechnol, Vol.14, 40.40~43, (2018),
    https://www.nature.com/articles/s41565-018-0306-9
  36. J. Suwardy, K. Nawaoka, J. Cho, M. Goto, Y. Suzuki, and S. Miwa, "Voltage-controlled magnetic anisotropy and voltage-induced Dzyaloshinskii-Moriya interaction change at the epitaxial Fe(001) / MgO(001) interface engineered by Co and Pd atomic-layer insertion", Phys. Rev. B, Vol.98, 144432.1~8, (2018),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.144432
  37. A. K. Shukla, M. Goto, X. Xu, K. Nawaoka, J. Suwardy, T. Ohkubo, K. Hono, S. Miwa and Y. Suzuki, "Voltage-Controlled Magnetic Anisotropy in Fe1−xCox/Pd/ MgO system", Sci. Rep, Vol.8, 10362.1~6, (2018),
    https://www.nature.com/articles/s41598-018-28445-3
  38. D. Saida, Y. Jibiki, M. Takagishi, T. Daibou, S. Kashiwada, M. Yakabe, J. Ito, M. Fukumoto, M. Goto, S. Miwa, and Y. Suzuki, "Periodic Fluctuations of Switching Probability in Spin-Transfer Magnetization Switching in Magnetic Tunnel Junctions", IEEE. Trans. Magn, Vol.54, 99.1~5, (2018),
    https://ieeexplore.ieee.org/document/8411441
  39. A. Bose, D. D. Lam, S. Bhuktare, S. Dutta, H. Singh, Y. Jibiki, M. Goto, S. Miwa and A. A. Tulapurkar, "Observation of Anomalous Spin Torque Generated by a Ferromagnet", Phys. Rev. Appl, Vol.9, 064026.1~11, (2018),
    https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.9.064026
  40. T. Kawabe, K. Shimose, M. Goto, Y. Suzuki, and S. Miwa, "Magnetic tunnel junction with Fe(001) / Co phthalocyanine / MgO(001) single-crystal multilayer", Appl. Phys. Express, Vol.11, 013201.1~3, (2018),
    https://iopscience.iop.org/article/10.7567/APEX.11.013201
  41. M. Suzuki, T. Tsukahara, R. Miyakaze, T. Furuta, K. Shimose, M. Goto, T. Nozaki, S. Yuasa, Y. Suzuki, and S. Miwa, "Extended X-ray absorption fi ne structure analysis of voltage-induced effects in the interfacial atomic structure of Fe / Pt / MgO", Appl. Phys. Express, Vol.10, 063006.1~4, (2017),
    https://iopscience.iop.org/article/10.7567/APEX.10.063006
  42. T. Kawabe, K. Yoshikawa, M. Tsujikawa, T. Tsukahara, K. Nawaoka, Y. Kotani, K. Toyoki, M. Goto, M. Suzuki, T. Nakamura, M. Shirai, Y. Suzuki, and S. Miwa, "Electric-field-induced changes of magnetic moments and magnetocrystalline anisotropy in ultrathin cobalt films", Phys. Rev. B, Vol.96, 220412.1~6, (2017),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.220412
  43. T. Tsukahara, T. Kawabe, K. Shimose, T. Furuta, R. Miyakaze, K. Nawaoka, M. Goto, T. Nozaki, S. Yuasa, Y. Kotani, K. Toyoki, M. Suzuki, T. Nakamura, Y. Suzuki, and S. Miwa, "Characterization of the magnetic moments of ultrathin Fe film in an external electric field via high-precision X-ray magnetic circular dichroism spectroscopy", Jpn. J. Appl. Phys, Vol.56, 060304.1~4, (2017),
    https://iopscience.iop.org/article/10.7567/JJAP.56.060304
  44. S. Miwa, J. Fujimoto, P. Risius, K. Nawaoka, M. Goto, and Y. Suzuki, "Strong Bias Effect on Voltage-Driven Torque at Epitaxial Fe-MgO Interface", Phys. Rev. X, Vol.7, 031018.1~9, (2017),
    https://journals.aps.org/prx/abstract/10.1103/PhysRevX.7.031018
  45. S. Miwa, M. Suzuki, M. Tsujikawa, K. Matsuda, T. Nozaki, K. Tanaka, T. Tsukahara, K. Nawaoka, M. Goto, Y. Kotani, T. Ohkubo, F. Bonell, E. Tamura, K Hono, T. Nakamura, M. Shirai, S. Yuasa, and Y. Suzuki, "Voltage controlled interfacial magnetism through platinum orbits", Nat. Commun, Vol.8, 15848.1~9, (2017),
    https://www.nature.com/articles/ncomms15848
  46. M. Goto, K. Nawaoka, S. Miwa, S. Hatanaka, N. Mizuochi, and Y. Suzuki, "Electric field modulation of tunneling anisotropic magnetoresistance in tunnel junctions with antiferromagnetic electrodes", Jpn. J. Appl. Phys, Vol.55, 080304.1~4, (2016),
    https://iopscience.iop.org/article/10.7567/JJAP.55.080304
  47. M. Goto and Y. Nozaki, "Current-driven antivortex core resonance measured by the rectifying effect", AIP. Adv, Vol.6, 025313.1~6, (2016),
    https://aip.scitation.org/doi/full/10.1063/1.4941360
  48. A. Yamaguchi, H. Hata, M. Goto, M. Kodama, Y. Kasatani, K. Sekiguchi, Y. Nozaki, T. Ohkochi, M. Kotsugi, and T. Kinoshita, "Real-space observation of magnetic vortex core gyration in a magnetic disc both with and without a pair tag", Jpn. J. Appl. Phys, Vol.55, 023002.1~13, (2016),
    https://iopscience.iop.org/article/10.7567/JJAP.55.023002
  49. S. Miwa, K. Matsuda, K. Tanaka, Y. Kotani, M. Goto, T. Nakamura, and Y. Suzuki, "Voltage-controlled magnetic anisotropy in Fe|MgO tunnel junctions studied by x-ray absorption spectroscopy", Appl. Phys. Lett, Vol.107, 162402.1~4, (2015),
    https://aip.scitation.org/doi/10.1063/1.4934568
  50. S. Hatanaka, S. Miwa, K. Matsuda, K. Nawaoka, K. Tanaka, H. Morishita, M. Goto, N. Mizuochi, T. Shinjo, and Y. Suzuki, "Tunnel anisotropic magnetoresistance in CoFeB|MgO|Ta junctions", Appl. Phys. Lett, Vol.107, 082407.1~4, (2015),
    https://aip.scitation.org/doi/10.1063/1.4929682
  51. M. Goto, Y. Nozaki and K. Sekiguchi, "Criteria for Electric Determination of Antivortex Creation in Ferromagnetic Thin Film", Jpn. J. Appl. Phys, Vol.54, 023001.1~4, (2015),
    https://iopscience.iop.org/article/10.7567/JJAP.54.023001
  52. H. Hata, M. Goto, A. Yamaguchi, T. Sato, Y. Nakatani and Y. Nozaki, "Coupled oscillations of vortex cores confined in a ferromagnetic elliptical disk", Phys. Rev. B, Vol.90, 104418.1~14, (2014),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.104418
  53. T. Ohkochi, A. Yamaguchi, M. Kotsugi, H. Hata, M. Goto, Y. Nozaki, T. Nakamura, H. Osawa and T. Kinoshita, "Progress in Time-Resolved Photoemission Electron Microscopy at BL25SUSPring-8 : Radiofrequency Field Excitation of Magnetic Vortex Core Gyration", Jpn. J. Appl. Phys, Vol.51, 128001.1~2, (2012),
    https://iopscience.iop.org/article/10.1143/JJAP.51.128001
  54. M. Goto, H. Hata, A. Yamaguchi, Y. Nakatani, T. Yamaoka, Y. Nozaki, and H. Miyajima, "Electric spectroscopy of vortex states and dynamics in magnetic disks", Phys. Rev. B, Vol.84, 064406.1~9, (2011),
    https://journals.aps.org/prb/abstract/10.1103/PhysRevB.84.064406
Conference papers
  1. T.N. A. Nguyen, Q. N. Pham, V. T. Chu, K. T. Do, T. H. Nguyen, H. N. Pham, M. Goto, M. Fukumoto, H. Tomita, T. Watanabe, H. Kubota, A. Fukushima, K. Yakushiji, and Y. Suzuki, "Highly sensitive detection of weak low frequency magnetic fields using single nanoscale orthogonal MgO magnetic tunnel junctions under a large bias field", Mater. Trans, Vol.64, 2128., (2023),
    https://www.jstage.jst.go.jp/article/matertrans/64/9/64_MT-MG2022017/_article/-char/en
  2. M. Goto, R. Ishikawa, H. Nomura, and Y. Suzuki, "Annealing Process of Co-Fe-B based Multilayers showing Skyrmion Brownian Motion", AIP. Adv, Vol.13, 25216.1~5, (2023),
    https://aip.scitation.org/doi/10.1063/9.0000582
  3. R. Ishihara, S. Lee, Y. Ando, R. Ohshima, M. Goto, S. Miwa, Y. Suzuki, H. Koike, and M. Shiraishi "Stability of spin XOR gate operation in silicon based lateral spin device with large variations in spin transport parameters", AIP. Adv, Vol.9, 125326 .1-6, (2019)
    https://aip.scitation.org/doi/10.1063/1.5129980
  4. M. Goto, H. Hata, A. Yamaguchi, Y. Nakatani, T. Yamaoka, and Y. Nozaki, "Electrical detection of vortex states in a ferromagnetic disk using the rectifying effect", J. Appl. Phys, Vol.109, 07D306.1~3, (2011),
    https://aip.scitation.org/doi/10.1063/1.3536390
  5. M. Goto, H. Hata, A. Yamaguchi, Y. Nakatani, T. Yamaoka, and Y. Nozaki, "Detection of vortex-core dynamics using current-induced self-bistable rectifying effect", J. Phys. Con. Ser, Vol.266, 012080.1~5, (2011),
    https://iopscience.iop.org/article/10.1088/1742-6596/266/1/012080
Educational paper
  1. 蓑輪陽介，藤原秀紀，大戸達彦，山田亮，後藤穣，細井優，生田力三，鶴田篤史，横山知大，夛田博一 "物性物理学に関する学生実験のオンライン化の試み", 日本物理学会「大学の物理教育」誌, Vol.28, 83, .83-87, (2022),
    https://www.jstage.jst.go.jp/browse/peu/list/-char/ja

Presentations

Domestic conference
  1. 土田拓海, 石川裕也, 福岡爽人, 川喜田圭祐, 藤井裕, 後藤穣 "Fe-Gd 超薄膜を用いた sub-THz 帯におけるスピンダイナミクスの検出", 2023年度日本物理学会北陸支部定例学術講演会, 福井大学文京キャンパス, C-a4, December 2, 2023 （口頭発表）
  2. T. Watanabe, M. Goto, Y. Ando, T. Watakabe, H. Nomura and Y. Suzuki, "Effect of channel crystallinity on magnetoresistance in silicon-inserted magnetic tunnel junctions", The 84th JSAP Autumn Meeting, Kumamoto-Jo Hall, September 19-23, 2023 （ポスター発表）
  3. M. Goto, "Thermally induced spin dynamics and devices", symposium: “Quantum Devices and Metrologies” held by The “Nanomaterials and Devices Research Area”, JAIST. JAIST, February 3rd, 2023 (口頭発表、招待講演)
  4. M. Goto, R. Ishikawa, H. Nomura, and Y. Suzuki, "Magnetic anisotropy change of MgO | SiO2 capped Co-Fe-B by annealing in atmosphere", The 68th JSAP Spring Meeting, 青山学院大学 相模原キャンパス + オンライン, 24p-P01-26, March 24th, 2022 （ポスター発表）
  5. M. Goto, Y. Yamada, A. Shimura, T. Suzuki, N. Degawa, T. Yamane, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Room temperature spin bolometer in sub-gigahertz frequency region", The 82th JSAP Autumn Meeting, オンライン, 11a-S302-5, September 11th, 2021 (口頭発表)
  6. M. Goto, R. Kobayashi, R. Okuno, Y. Yamada, T. Mizuno, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Enhancement of heat controlled magnetic anisotropy by a MgO | tungsten | MgO capping layer", The 82th JSAP Autumn Meeting, オンライン, 11a-S302-4, September 11th, 2021 (口頭発表)
  7. M. Goto, H. Nomura, and Y. Suzuki, "Stochastic motion of skyrmions by perpendicular alternating magnetic field", The 68th JSAP Spring Meeting, オンライン, 17a-Z19-5, March 17th, 2021 (口頭発表)
  8. 後藤穣, 山田侑馬, 奥野僚太, 三輪真嗣, 野村光, 鈴木義茂 "熱トルクによるスピン制御", 令和 3 年 東北大学電気通信研究所 共同プロジェクト研究会「固体中のスピン・軌道ダイナミクスとその制御」, オンライン, February 22nd, 2021 (口頭発表、招待講演)
  9. 後藤穣、地引勇磨、石川諒、田中裕士、三木颯馬、田村英一、Jaehun Cho, 野村光、Titiksha Srivastava、Willy Lim、Stephene Auffret、Claire Baraduc、Helene Bea、鈴木義茂、 "スキルミオンブラウン運動の制御とブラウニアン演算素子の実現に向けた基本素子の開発", 第二回ナノ研究会（電気学会マグネティックス研究会ナノスケール磁性体を用いた機能性材料開発調査専門委員会主催）, オンライン, October 27th, 2020 (口頭発表、招待講演)
  10. Minori Goto, Hikaru Nomura, and Yoshishige Suzuki, "Diffusive motion of skyrmions enhanced by perpendicular alternating magnetic field", The 67th JSAP Spring Meeting, Sophia University, 14p-PA1-55, March 14th, 2020 (ポスター発表)
  11. 後藤穣、地引勇磨、野崎隆行、三木颯馬、田村英一、Jaehun Cho, 野村光、Titiksha Srivastava, Willy Lim, Stephene Auffret, Claire Baraduc, Helene Bea, 鈴木義茂 "スキルミオンブラウニアンコンピューティング", 第41回光機能磁性デバイス・材料専門研究会, 長岡技術科学大学　東京サテライト、 January 31st, 2020 (口頭発表、招待講演)
  12. M. Goto, T. Nozaki, H. Nomura, H. Kubota, Y. Suzuki, "Brownian computing using skyrmions and reservoir computing in magnetic dot-arrays", The 43rd Annual Conference on Magnetics in Japan, 京都大学、 27aB-3, September 27th, 2019 (口頭発表、招待講演)
  13. M. Goto, Y. Yamada, A. Shimura, T. Suzuki, N. Degawa, T. Yamane, S. Aoki, J. Urabe, S. Hara, and Y. Suzuki, "Giant spin torque diode effect induced by nonlinear spin dynamics in double-MgO magnetic tunnel junctions", The 79th JSAP Autumn Meeting, Hokkaido University 20p-E216-20, September 20th, 2019 (口頭発表)
  14. M. Goto, Y. Yamada, A. Shimura, T. Suzuki, N. Degawa, T. Yamane, S. Aoki, J. Urabe, S. Hara, and Y. Suzuki, “Heat-induced giant spin-torque diode effect”, The 66th JSAP Spring Meeting, Tokyo Institute of Technology, 11p-M101-15, March 11th, 2019 (口頭発表)
  15. M. Goto, K. Yoshikawa, S. Miwa, and Y. Suzuki, “Perpendicular magnetic anisotropy and magnetization switching process in Fe|Co|MgO multilayer”, The 79th JSAP Autumn Meeting, Nagoya Congress Center, 18p-PB1-73, September 18th, 2018 (ポスター発表)
  16. M. Goto, Y. Wakatake, U. K. Oji, N. Strelkov, B. Dieny, S. Miwa, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, “Simulation of microwave excitation in micro strip line induced by radio-frequency signal amplification using magnetic tunnel junctions”, The 65th JSAP Spring Meeting, Waseda University, 17p-P10-71, March 17th, 2018 (ポスター発表)
  17. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, “Efficient excitation of ferromagnetic resonance for radio-frequency amplification in magnetic tunnel junctions”, The 78th JSAP Autumn Meeting, Fukuoka International convention center, 6a-C18-11, September6th, 2017 (口頭発表)
  18. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, “Radio-frequency signal amplification by spin torque driven ferromagnetic resonance in magnetic tunnel junctions”, The 64th JSAP Spring Meeting, Pacifico Yokohama, 14p-P10-91, March14th, 2017 (ポスター発表)
  19. M. Goto, S. Miwa, K. Nawaoka, S. Hatanaka, N. Mizuochi, and Y. Suzuki, “Transport properties in tunnel junction with IrMn ultrathin film”, The 76th JSAP Autumn Meeting, Nagoya Congress Center, 13p-PA1-14, September 13th, 2015 (ポスター発表)
  20. 後藤穣、棚澤友幾、関口康爾、能崎幸雄、 “強磁性交差細線における磁気反渦の共鳴”, 第70回日本物理学会年次大会、 早稲田大学、 21pPSA-29、 2015年3月21日 （ポスター発表）
  21. 後藤穣、棚澤友幾、関口康爾、能崎幸雄、 “強磁性交差細線を用いたAntivortexの高効率生成”, 第69回日本物理学会秋季大会、 中部大学、 9pBF-4、 2014年9月9日 （口頭発表）
  22. 後藤穣、棚澤友幾、関口康爾、能崎幸雄、 “X型強磁性交差細線におけるAntivortex生成過程と電気的判定”, 第38回日本磁気学会学術講演会、 慶應義塾大学、 4pC-6、 2014年9月4日 （口頭発表）
  23. 後藤穣、関口康爾、能崎幸雄、 “強磁性交差細線に形成される磁気反渦の電気的測定”, 第69回日本物理学会年次大会、 東海大学、 27aPS-32、 2014年3月27日 （ポスター発表）
  24. 後藤穣、関口康爾、能崎幸雄、 “渦磁壁に作用するスピントランスファー効果の磁化勾配依存性に関する研究”, 第68回日本物理学会秋季大会、 徳島大学、 25aPS-24、 2013年9月25日 （ポスター発表）
  25. 後藤穣、関口康爾、能崎幸雄、 “強磁性円盤に閉じ込めた磁気渦の共鳴スペクトル強度を用いたβトルク測定”, 第68回日本物理学会年次大会、 広島大学、 28pXY-6、 2013年3月28日 （口頭発表）
  26. 後藤穣、児玉基、関口康爾、能崎幸雄、 “整流測定法を利用した磁気渦の軌道検出”, 第67回の日本物理学会秋季大会、 横浜国立大学、 19aCC-13、 2012年9月19日 （口頭発表）
  27. 後藤穣、畑拓志、山口明啓、山岡武博、仲谷栄伸、能崎幸雄、 “FeNi強磁性円盤における磁気渦の共鳴スペクトルと軸構造依存性”, 第65回日本物理学会秋季大会、 大阪府立大学、 24aWP-2、 2010年9月24日 （口頭発表）
  28. 後藤穣、畑拓志、山口明啓、山岡武博、仲谷栄伸、宮島英紀、 “NiFe強磁性ドットにおけるボルテックスコアの磁気共鳴と周波数変調”, 第65回日本物理学会年次大会、 岡山大学、 20pGJ-9、 2010年3月20日 （口頭発表）
International conference
  1. Y. Tanaka, M. Goto, A. K. Shukla, K. Yoshikawa, H. Nomura, S. Miwa, S. Tomishima, and Y. Suzuki, "Physically Unclonable Functions using Voltage-Controlled Magnetic Anisotropy Effect in Magnetic Tunnel Junctions", The 68rd Annual conference on Magnetism and Magnetic Materials (MMM 2023), Dallas, Texas, USA, FD-09, October 30-November 3, 2023, （口頭発表）
  2. T. Watanabe, M. Goto, Y. Ando, H. Nomura, and Y. Suzuki, "Poly-Crystalline Silicon-inserted Vertical Spin Valve", Trends in MAGnetism 2023, Rome, Italy, September 3-8, 2023, （口頭発表）
  3. M. Goto, ”Joule heat driven microwave spin devices", SPIN CALORITRONICS XII, Tsukuba, Ibaraki, Japan, May 21-25, 2023, （口頭発表、招待講演）
  4. M. Goto, R. Ishikawa, H. Nomura, and Y. Suzuki, "Annealing Process of Co-Fe-B based Multilayers showing Skyrmion Brownian Motion", The 67rd Annual conference on Magnetism and Magnetic Materials (MMM 2022), Minneapolis, Minesota, USA & Online, HPB-06, October 31-November 4, 2022, (ポスター発表)
  5. M. Goto, H. Nomura, and Y. Suzuki, "Stochastic dynamics of skyrmion bubble by alternating magnetic fields", 2022 Joint European Magnetic Symposia (JEMS 2022), Warsaw, Poland & Online, S13.1.3, July 25-29, 2022, （口頭発表）
  6. M. Goto, Y. Yamada, A. Shimura, T. Suzuki, N. Degawa, T. Yamane, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Uncooled sub-gigahertz spin bolometer", The 15th Joint MMM-Intermag Conference (2022 Joint), New Orleans, Louisiana, USA, IOB-01, January 10-14, 2022, （口頭発表、招待講演）
  7. M. Goto, R. Kobayashi, R. Okuno, Y. Yamada, T. Mizuno, T. Yamane, N. Degawa, T. Suzuki, A. Shimura, S. Aoki, J. Urabe, S. Hara, H. Nomura, and Y. Suzuki, "Enhancement of heat controlled magnetic anisotropy by improving a thermal design of magnetic tunnel junctions", The 15th Joint MMM-Intermag Conference (2022 Joint), New Orleans, Louisiana, USA, GOQ-03, January 10-14, 2022, （口頭発表）
  8. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, N. Strelkov, B. Dieny, H. Kubota, K. Yakushiji, A. Fukushima, and Y. Suzuki, “Giant Spin-Torque induced by Heat-Controlled Magnetic Anisotropy”, The 63rd Annual conference on Magnetism and Magnetic Materials (MMM 2019), Las Vegas, Nevada, USA, FC-05, November 4-8, 2019, （口頭発表、招待講演）
  9. M. Goto, Y. Wakatake, U. K. Oji, N. Furuichi, S. Miwa, N. Strelkov, B. Dieny, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, "Heat Controlled Magnetic Anisotropy Effect", The 10th Pacific Rim International Conference on Advanced Materials and Processing, Xi'an, P. R. China, 1233215, August 18-22, 2019, （口頭発表、招待講演）
  10. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, N. Strelkov, B. Dieny, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, “Negative Resistance and Amplification of Microwave in Heat-driven Magnetic Tunnel Junctions”, The 2019 Joint MMM-Intermag Conference, Washington, DC, USA, AG-10, January 14-18, 2019, （口頭発表）
  11. M. Goto, Y. Wakatake, U. K. Oji, S. Miwa, H. Kubota, K. Yakushiji, A. Fukushima, S. Yuasa, and Y. Suzuki, “Radio-Frequency Amplification of Electric Signal Controlled by Joule Heating and Spin Transfer Torque in Magnetic Tunnel Junctions”, The 62nd Annual Conference on Magnetism and Magnetic Materials (MMM 2017), Pittsburgh, Pennsylvania, USA, CI-06, November 6-9, 2017, （口頭発表）
  12. A M. Goto, K. Nawaoka, S. Miwa, S. Hatanaka, N. Mizuochi, and Y. Suzuki, “Voltage modulation of switching field in antiferromagnetic thin film measured by tunneling anisotropic magnetoresistance”, 13th Joint Magnetism and Magnetic Materials – Intermag Conference (Joint Conference 2016), San Diego, California, USA, BT-01, January 2016, (ポスター発表)
  13. M. Goto, T. Tanazawa, K. Sekiguchi and Y. Nozaki, “Stochastic Magnetization Process of Antivortex Formation in X-Shaped Cross Wire investigated by Magnetoresistance measurement and Magnetic Force Microscopy”, The 59th Annual Magnetism and Magnetic Materials Conference, Honolulu, Hawaii, USA, GW-05, November 2014, (ポスター発表)
  14. M. Goto, K. Sekiguchi and Y. Nozaki, “Analytical study of phase and amplitude of vortex gyration using a microwave spectroscopy”, 12th Joint Magnetism and Magnetic Materials / Intermag Conference (Joint Conference 2013), Chicago, Illinois, USA, GP-01, January 2013, （ポスター発表）
  15. M. Goto, K. Sekiguchi and Y. Nozaki, “Quantitative analysis of spin torque effect in the magnetic vortex structure”, International Conference of the Asian Union of Magnetics Societies (ICAUMS 2012), Nara, Japan, 2pPS-8, October 2012, （ポスター発表）
  16. M. Goto, H. Hata, A. Yamaguchi, Y. Nakatani, T. Yamaoka and Y. Nozaki、 “Electrical detection of vortex states in a ferromagnetic disk through the rectifying effect”, 55th Annual Conference on Magnetism and Magnetic Materials (MMM2010)、 Atlanta, Georgia, USA、 EP-06、 November 2010, （ポスター発表）
  17. M. Goto, H. Hata, A. Yamaguchi, H. Miyajima and Y. Nakatani、 “Detection of vortex-core dynamics using current-induced self-bistable rectifying effect”, International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)、 Sendai, Japan、 AY-07、 July2010, （口頭発表）
  18. M. Goto, A. Kanome, K. Sekiguchi, A. Yamaguchi and H. Miyajima、 “Effect of Ferromagnetism on AB oscillation in Normal Metal Ring with a Nano-Scale Ferromagnetic Dot”, International Conference on Magnetism (ICM2009)、 Karlsruhe, Germany、 Tu-B-7.8-23、 July 2009 （ポスター発表）
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