Publication 2019

Publication 2019

The articles written in black are original papers, those indicated in grey are conference proceedings.The articles written in green are review papers or book chapters.

Magnetic Materials:

  • Nd-Fe-B焼結磁石のマルチスケール組織解析
    佐々木泰祐, 『次世代永久磁石の開発最前線 ~磁性の解明から構造解析、省・脱レアアース磁石、モータ応用まで~』 (監修 尾崎公洋、杉本諭), 第1編 第2章 (2019).

  • The effect of Zr substitution on saturation magnetization in (Sm1-xZrx)(Fe0.8Co0.2)12 compound with the ThMn12 structure
    P. Tozman, Y.K. Takahashi, H. Sepehri-Amin, D. Ogawa, S. Hirosawa, K. Hono, Acta Mater. 178, 114-121 (2019).

  • Comparison of coercivity and squareness in hot-deformed and sintered magnets produced from a Nd-Fe-B-Cu-Ga alloy
    X.D. Xu, H. Sepehri-Amin, T.T. Sasaki, M. Soderžnik, X. Tang, T. Ohkubo, K. Hono, Scripta Mater. 160, 9-14 (2019).

  • Influence of Ti addition on microstructure and magnetic properties of a heavy-rare-earth-free Nd-Fe-B sintered magnet
    X.D. Xu, Z.J. Dong, T.T. Sasakia, Xin Tang, H. Sepehri-Amin, T.Ohkubo, K.Hono, J. Alloys. Comp. 806, 1267-1275 (2019).

  • Temperature dependent magnetization reversal process of a Ga-doped Nd-Fe-B sintered magnet based on first-order reversal curve analysis
    Satoshi Okamoto, Kazunori Miyazawa, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Yukio Takada, Takashi Sato, Yuji Kaneko, Akira Kato, Acta Mater. 178, 90-98 (2019).

  • First-order reversal curve analysis of a Nd-Fe-B sintered magnet with soft X-ray magnetic circular dichroism microscopy
    Kazunori Miyazawa, Satoshi Okamoto, Takahiro Yomogita, Nobuaki Kikuchi, Osamu Kitakami, Kentaro Toyoki, David Billington, Yoshinori Kotani, Tetsuya Nakamura, Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono, Acta Mater. 162, 1-9 (2019).

  • Microstructure and coercivity of grain boundary diffusion processed Dy-free and Dy-containing Nd-Fe-B sintered magnets
    T.-H. Kim, T.T. Sasaki, T. Ohkubo, Y. Takada, A. Kato, Y. Kaneko, K. Hono, Acta Mater. 172, 139-149 (2019).

  • Anisotropic, single-crystalline SmFe12-based microparticles with high roundness fabricated by jet-milling
    I. Dirba, J. Li, H. Sepehri-Amin, T. Ohkubo, T. Schrefl, K. Hono, J. Alloys. Comp. 804, 155-162 (2019).

  • Role of Ga on the high coercivity of Nd-rich Ga-doped Nd-Fe-B sintered magnet
    T.T. Sasaki, Y. Takada, H. Okazaki, T. Ohkubo, T. Nakamura, T. Sato, A. Kato, Y. Kaneko, K. Hono, J. Alloys. Comp. 790, 750-759 (2019).

  • Magnetization reversal process of anisotropic hot-deformed magnets observed by magneto-optical Kerr effect microscopy
    M. Soderžnik, J. Li, Lihua Liu, H. Sepehri-Amin, T. Ohkubo, N. Sakuma, T. Shoji, A. Kato, T. Schrefl, K. Hono, J. Alloys. Comp. 771, 51-59 (2019).

  • Emergence of coercivity in Sm(Fe0.8Co0.2)12 thin films via eutectic alloy grain boundary infiltration
    D. Ogawa, X.D. Xu, Y.K. Takahashi, T. Ohkubo, S. Hirosawa, K. Hono, Scripta Mater. 164, 140-144 (2019).

  • Impact of carbon segregant on microstructure and magnetic properties of FePt-C nanogranular films on MgO (001) substrate
    J. Wang, H. Sepehri-Amin, H. Tajiri, T. Nakamura, K. Masuda, Y.K. Takahashi, T. Ina, T. Uruga, I. Suzuki, Y. Miura, and K. Hono, Acta Mater. 166, 413-423 (2019).

  • High melting point metal (Pt, W) seed layer for grain size refinement of FePt-based heat-assisted magnetic recording media
    Jian Wang, D. Liu, Ippei Suzuki, Yukiko Takahashi, Mi Yan, and Kazuhiro Hono, Appl. Phys. Express 12, 023007 (2019).

  • Design of spin-injection-layer in all-in-plane spin-torque-oscillator for microwave assisted magnetic recording
    H. Sepehri-Amin, W. Zhou, S. Bosu, C. Abert, Y. Sakuraba, S. Kasai, D. Suess, K. Hono, J. Magn. Magn. Mater. 476, 361-370 (2019).

  • Development of ultra-fine grain sized SmFe12-based powders using hydrogenation disproportionation desorption recombination process
    I. Dirba, H. Sepehri-Amin, T. Ohkubo, K. Hono, Acta Mater. 165, 373-380 (2019).
  • Spintronic Materials:

  • Predictive Materials Design of Magnetic Random-Access Memory Based on Nanoscale Atomic Structure and Element Distribution
    X. Li, T.T. Sasaki, C. Grezes, D. Wu, K.L. Wong, C. Bi, P.V. Ong, F. Ebrahimi, G. Q. Yu, N. Kioussis, W.G. Wang, T. Ohkubo, P. Khalili Amiri, K.L. Wang, Nano Lett. 19, 8621-8629 (2019).

  • Perpendicular orbital and quadrupole anisotropies at Fe/MgO interfaces detected by x-ray magnetic circular and linear dichroisms
    J. Okabayashi, Y. Iida, Q. Xiang, H. Sukegawa and S. Mitani, Appl. Phys. Lett. 115, 252402 (2019).

  • Spin-charge conversion in NiMnSb Heusler alloy films
    Z. Wen, Z. Qiu, S. Tölle, C. Gorini, T. Seki, D. Hou, T. Kubota, U.Eckern, E. Saitoh, and K. Takanashi, Science Advances 5, eaaw9337 (2019).

  • Structural-order dependence of anomalous Hall effect in Co2MnGa topological semimetal thin films
    Q. Wang, Z. Wen, T. Kubota, T. Seki, and K. Takanashi, Appl. Phys. Lett. 115, 252401 (2019).

  • Experimental verification of the origin of positive linear magnetoresistance in CoFe(V1−xMnx)Si Heusler alloys
    S.Yamada, S. Kobayashi, A. Masago, L.S.R. Kumara, H. Tajiri, T. Fukushima, S. Abo, Y. Sakuraba, K. Hono, T. Oguchi, and K. Hamaya, Phys. Rev. B 100, 195137 (2019).

  • Band match enhanced current-in-plane giant magnetoresistance in epitaxial Co50Fe50/Cu multilayers with metastable bcc-Cu spacer
    Kresna B. Fathoni, Yuya Sakuraba, Taisuke Sasaki, Yoshio Miura, Jin W. Jung, Tomoya Nakatani, and Kazuhiro Hono, APL Materials 7, 111106 (2019).

  • Realizing Room-Temperature Resonant Tunnel Magnetoresistance in Cr/Fe/MgAl2O4 Quasi-Quantum Well Structures
    Qingyi Xiang, Hiroaki Sukegawa, Mohamed Belmoubarik, Muftah Al‐Mahdawi, Thomas Scheike, Shinya Kasai, Yoshio Miura, Seiji Mitani, Adv. Sci. 6, 1901438 (2019).

  • Impact of oxygen interdiffusion on spin-to-charge conversion at nonmagnetic metal/Bi oxide interfaces
    S. Sugimoto, J. Uzuhashi, S. Isogami, T. Ohkubo, Y. K. Takahashi, S. Kasai, and K. Hono, Phys. Rev. Materials 3, 104410 (2019).

  • Temperature-dependent spin Hall effect tunneling spectroscopy in platinum
    Keita Nakagawara, Shinya Kasai, Jeongchun Ryu, Seiji Mitani, Luqiao Liu, Makoto Kohda, and Junsaku Nitta, Appl. Phys. Lett. 115, 162403 (2019).

  • Strain relaxation in epitaxial γ'-Fe4N ultrathin films
    Ippei Suzuki, Jun Uzuhashi, Tadakatsu Ohkubo, Shinji Isogami, Mater. Res. Express 6, 106446 (2019).

  • Observation of the magnetization metastable state in a perpendicularly magnetized nanopillar with asymmetric potential landscape
    Shuichi Iwakiri, Satoshi Sugimoto, Yasuhiro Niimi, Kensuke Kobayashi, Yukiko K. Takahashi, and Shinya Kasai, Appl. Phys. Lett. 115, 092407 (2019).

  • Microstructure, magnetic and transport properties of a Mn2CoAl Heusler compound
    X.D. Xu, Z.X. Chen, Y. Sakuraba, A. Perumal, K. Masuda, L.S.R. Kumara, H. Tajiri, T. Nakatani, J. Wang, W. Zhou, Y. Miura, T. Ohkubo, K. Hono, Acta Mater. 176, 33-42 (2019).

  • Voltage-controlled magnetic skyrmions in magnetic tunnel junctions
    Shinya Kasai, Satoshi Sugimoto, Yoshinobu Nakatani, Ryo Ishikawa and Yukiko K. Takahashi, Appl. Phys. Express 12, 083001 (2019).

  • Nonequilibrium skyrmion accumulation induced by direct current in Ir/Co/Pt heterostructure
    Satoshi Sugimoto, Shinya Kasai, Evgeny Anokhin, Yukiko Takahashi and Yoshinori Tokura, Appl. Phys. Express 12, 073002 (2019).

  • Inducing out-of-plane precession of magnetization for microwave-assisted magnetic recording with an oscillating polarizer in a spin-torque oscillator
    W. Zhou, H. Sepehri-Amin, T. Taniguchi, S. Tamaru, Y. Sakuraba, S. Kasai, H. Kubota, and K. Hono, Appl. Phys. Lett. 114, 172403 (2019).

  • Over 100% magnetoresistance ratio at room temperature in magnetic tunnel junctions with CuGaSe2 spacer layer
    K. Mukaiyama, J.W. Jung, H. Sepehri-Amin, S. Kasai, T. Furubayashi, T. Ohkubo, and K. Hono, Appl. Phys. Lett. 114, 172402 (2019).

  • Epitaxial oxide barriers for magnetic tunnel junctions (pp46-49)
    Hiroaki Sukegawa, Kazuhiro Hono, M. Coll et al., "Towards Oxide Electronics: a Roadmap", Applied Surface Science 482, 1-93 (2019).

  • Crystalline-structure-dependent magnetoresistance in ferromagnetic metal/conducting amorphous oxide heterostructures
    Shinji Isogami, Jun Uzuhashi, Tadakatsu Ohkubo, and Masamitsu Hayashi, Phys. Rev. Materials 3, 024408 (2019).
  • Spin Caloritronics:

  • Thermoelectric microscopy of magnetic skyrmions
    Ryo Iguchi, Shinya Kasai, Kazushige Koshikawa, Norimichi Chinone, Shinsuke Suzuki & Ken-ichi Uchida, Sci. Rep. 9, 18443 (2019).

  • Observation of anomalous Ettingshausen effect and large transverse thermoelectric conductivity in permanent magnets
    Asuka Miura, Hossein Sepehri-Amin, Keisuke Masuda, Hiroki Tsuchiura, Yoshio Miura, Ryo Iguchi, Yuya Sakuraba, Junichiro Shiomi, Kazuhiro Hono, and Ken-ichi Uchida, Appl. Phys. Lett. 115, 222403 (2019).

  • Mechanism of strong enhancement of anomalous Nernst effect in Fe by Ga substitution
    Hiroyasu Nakayama, Keisuke Masuda, Jian Wang, Asuka Miura, Ken-ichi Uchida, Masayuki Murata, and Yuya Sakuraba, Phys. Rev. Materials 3, 114412 (2019).

  • Electric-field-induced on-off switching of anomalous Ettingshausen effect in ultrathin Co films
    Hiroyasu Nakayama*, Takamasa Hirai*, Jun Uzuhashi, Ryo Iguchi, Tadakatsu Ohkubo, Tomohiro Koyama, Daichi Chiba and Ken-ichi Uchida, Appl. Phys. Express 12, 123003 (2019). (*equal contribution)

  • Interfacial ferromagnetism and atomic structures in high-temperature grown Fe3O4/Pt/Fe3O4 epitaxial trilayers
    T. Kikkawa, M. Suzuki, R. Ramos, M. H. Aguirre, J. Okabayashi, K. Uchida, I. Lucas, A. Anadon, D. Kikuchi, P. A. Algarabel, L. Morellon, M. R. Ibarra, and E. Saitoh, J. Appl. Phys. 126, 143903 (2019).

  • Strain-induced switching of heat current direction generated by magneto-thermoelectric effects
    Shinya Ota*, Ken-ichi Uchida*, Ryo Iguchi, Pham Van Thach, Hiroyuki Awano, Daichi Chiba, Sci. Rep. 9, 13197 (2019). (*equal contribution)

  • Direct observation of magneto-Peltier effect in current-in-plane giant magnetoresistive spin valve
    Hiroyasu Nakayama, Tomoya Nakatani, Ryo Iguchi, Takeshi Seki, and Ken-ichi Uchida, Appl. Phys. Lett. 115, 092406 (2019).

  • Spincaloritronic measurements: a round robin comparison of the longitudinal spin Seebeck effect
    A. Sola, V. Basso, M. Kuepferling, M. Pasquale, D. Meier, G. Reiss, T. Kuschel, T. Kikkawa, K. Uchida, E. Saitoh, H. Jin, S. Boona, S. Watzman, J. Heremans, M. B. Jungfleisch, W. Zhang, J. E. Pearson, A. Hoffmann, and H. W. Schumacher, IEEE Trans. Instrum. Meas. 68, 1765-1773 (2019).

  • Interface-induced anomalous Nernst effect in Fe3O4/Pt-based heterostructures
    R. Ramos, T. Kikkawa, A. Anadon, I. Lucas, T. Niizeki, K. Uchida, P. A. Algarabel, L. Morellon, M. H. Aguirre, M. R. Ibarra, and E. Saitoh, Appl. Phys. Lett. 114, 113902 (2019).

  • Systematic investigation of anisotropic magneto-Peltier effect and anomalous Ettingshausen effect in Ni thin films
    R. Das, R. Iguchi, and K. Uchida, Phys. Rev. Applied 11, 034022 (2019).

  • First-principles study of the anisotropic magneto-Peltier effect
    Keisuke Masuda, Ken-ichi Uchida, Ryo Iguchi, and Yoshio Miura, Phys. Rev. B 99, 104406 (2019).

  • Machine-learning guided discovery of a new thermoelectric material
    Y. Iwasaki, I. Takeuchi, V. Stanev, A. G. Kusne, M. Ishida, A. Kirihara, K. Ihara, R. Sawada, K. Terashima, H. Someya, K. Uchida, E. Saitoh, and S. Yorozu, Sci. Rep. 9, 2751 (2019).

  • Thermopile based on anisotropic magneto-Peltier effect
    R. Das and K. Uchida, Appl. Phys. Lett. 114, 082401 (2019).

  • Anomalous Ettingshausen effect in ferrimagnetic Co-Gd
    T. Seki, A. Miura, K. Uchida, T. Kubota, and K. Takanashi, Appl. Phys. Express 12, 023006 (2019).

  • Thickness dependence of transverse thermoelectric voltage in Co40Fe60/YIG magnetic junctions
    P. Wongjom, R. Ramos, S. Pinitsoontorn, K. Uchida, and E. Saitoh, J. Magn. Magn. Mater. 471, 439-443 (2019).
  • Nanostructure Analysis:

  • 時効析出を用いたマグネシウム展伸合金の開発
    佐々木泰祐、宝野和博, 軽金属 69, 217-222 (2019).

  • Atomic-scale quantitative analysis of implanted Mg in annealed GaN layers on free-standing GaN substrates
    Ashutosh Kumar, Jun Uzuhashi, Tadakatsu Ohkubo, Ryo Tanaka, Shinya Takashima, Masaharu Edo, and Kazuhiro Hono, J. Appl. Phys. 126, 235704 (2019).

  • Influence of photoexcited carriers on compositional measurements by APT: AlGaN alloy case study
    Yuya Kanitani, Shigetaka Tomiya, Tadakatsu Ohkubo and Kazuhiro Hono, Jpn. J. Appl. Phys. 58, 096505 (2019).

  • Change of Deformation Mechanisms Leading to High Strength and Large Ductility in Mg-Zn-Zr-Ca Alloy with Fully Recrystallized Ultrafine Grained Microstructures
    Ruixiao Zheng, Tilak Bhattacharjee, Si Gao, Wu Gong, Akinobu Shibata, Taisuke Sasaki, Kazuhiro Hono & Nobuhiro Tsuji, Sci. Rep. 9, 11702 (2019).

  • Origin of texture weakening in a rolled ZEX4101 alloy sheet and its effect on room temperature formability and tensile property
    T. Nakata, C. Xu, Y. Uehara, T.T. Sasaki, S. Kamado, J. Alloys. Comp. 782, 304-314 (2019).

  • Determining the strength of GP zones in Mg alloy AXM10304, both parallel and perpendicular to the zone
    J.J. Bhattacharyya, T.T. Sasaki, T. Nakata, K. Hono, S. Kamado, S.R. Agnew, Acta Mater. 171, 231-239 (2019).

  • Cathodoluminescence and scanning transmission electron microscopy study of InGaN/GaN quantum wells in core-shell GaN nanowires
    Wei Yi, Jun Uzuhashi, Jun Chen, Takashi Kimura, Satoshi Kamiyama, Tetsuya Takeuchi, Tadakatsu Ohkubo, Takashi Sekiguchi and Kazuhiro Hono, Appl. Phys. Express 12, 085003 (2019).
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