Publication 2020

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National Institute for Material Science

Publication 2020

* 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.
* Sorted by Research Fields.
Magnetic Materials / Spintronic Materials / Spin Caloritronics / Nanostructure Analysis / Other Fields

Magnetic Materials:

  1. Achievement of high coercivity in Sm(Fe0.8Co0.2)12 anisotropic magnetic thin film by boron doping [Click here to download PDF (*This article is open access.)]
    H. Sepehri-Amin, Y. Tamazawa, M. Kambayashi, G. Saito, Y.K. Takahashi, D. Ogawa, T. Ohkubo, S. Hirosawa, M. Doi, T. Shima, K. Hono, Acta Mater. 194, 337-342 (2020).

  2. 磁気記録の材料と物理
    高橋有紀子、日本物理学会誌75, 736 (2020)

  3. Tuning transition temperature of magnetocaloric Mn1.8Fe0.2(P0.59Si0.41)x alloys for cryogenic magnetic refrigeration
    J. Lai, X. Tang, H. Sepehri-Amin, K.Hono, Scr. Mater. 183, 127-132 (2020).

  4. Thermally-stable high coercivity Ce-substituted hot-deformed magnets with 20% Nd reduction
    X. Tang, S.Y. Song, J. Li, H. Sepehri-Amin, T. Ohkubo, K. Hono, Acta Mater. 190, 8-15 (2020).

  5. Angular dependence and thermal stability of coercivity of Nd-rich Ga-doped Nd–Fe–B sintered magnet
    J. Li, X. Tang, H. Sepehri-Amin, T.T. Sasaki, T. Ohkubo, K. Hono, Acta Mater. 187, 66-72 (2020).

  6. Control of grain density in FePt-C granular thin films during initial growth
    I. Suzuki, J. Wang, Y.K.Takahashi, K. Hono, J. Magn. Magn. Mater. 500, 166418 (2020).

  7. Magnetic Flux Density Measurements from Grain Boundary Phase in 0.1 at% Ga-doped Nd-Fe-B Sintered Magnet
    Y. Cho, T.T. Sasaki, K. Harada, A. Sato, T. Tamaoka, D. Shindo, Ohkubo, K. Hono, Y. Murakami, Scr. Mater. 178, 553-538 (2020).

  8. Formation mechanism of Tb-rich shell in TbH2-grain boundary diffusion processed Nd-Fe-B sintered magnets
    T.-H. Kim, T.T. Sasaki, T. Ohkubo, Y. Fujikawa, M. Miwa, Y. Enokido, K. Hono, Scr. Mater. 178, 433-437 (2020).

  9. Relationship between the thermal stability of coercivity and the aspect ratio of grains in Nd-Fe-B magnets: Experimental and numerical approaches
    X. Tang, J. Li, Y. Miyazaki, H. Sepehri-Amin, T. Ohkubo, T. Schrefl, K. Hono, Acta Mater. 183, 408-417 (2020).

  10. An alternative approach to the measurement of anisotropy field – Single grain extraction
    P. Tozman, H. Sepehri-Amin, L.T. Zhang, J. Wang, X.D. Xu, K. Hono, J. Magn. Magn. Mater. 494, 165747 (2020).

  11. Magnetic anisotropy constants of ThMn12-type Sm(Fe1-xCox)12 compounds and their temperature dependence
    D. Ogawa, T. Yoshioka, X.D. Xu, Y.K. Tahakashi, H. Tsuchiura, T. Ohkubo, S. Hirosawa, K. Hono, J. Magn. Magn. Mater. 497, 165965 (2020).

  12. Thermal decomposition of ThMn12-type phase and its optimum stabilizing elements in SmFe12-based alloys
    I. Dirba, Y. Harashima, H. Sepehri-Amin, T. Ohkubo, T. Miyake, S. Hirosawa, K. Hono, J. Alloys Compd. 813, 152224 (2020).

Spintronic Materials:

  1. Generation of multipeak spectrum of spin torque oscillator in non-linear regime
    S. Iwakiri, S. Sugimoto, Y. Niimi, K. Kobayashi, Y. Kozuka, Y.K. Takahashi, S. Kasai, Appl. Phys. Lett. 117, 22406 (2020).

  2. Thickness dependence of degree of B2 order of polycrystalline Co2(Mn0.6Fe0.4)Ge Heusler alloy films measured by anomalous X-ray diffraction and its impacts on current-perpendicular-to-plane giant magnetoresistance properties
    T. Nakatani, S.K. Narayananellore, L.S.R. Kumara, H. Tajiri, Y. Sakuraba, K. Hono, Scr. Mater. 189, 63-66 (2020).

  3. Unveiling spin-dependent unoccupied electronic states of Co2MnGe (Ga) film via Ge (Ga) L2,3 absorption spectroscopy
    T. Yoshikawa, V. N. Antonov, T. Kono, M. Kakoki, K. Sumida, K. Miyamoto, Y. Takeda, Y. Saitoh, K. Goto, Y. Sakuraba, K. Hono, A. Ernst, and A. Kimura, Phys. Rev. B 102, 064428 (2020).

  4. Spin-Resolved Contribution to Perpendicular Magnetic Anisotropy and Gilbert Damping in Interface-Engineered Fe/MgAl2O4 Heterostructures
    R. Mandal, Q. Xiang, K. Masuda, Y. Miura, H. Sukegawa, S. Mitani, Y.K. Takahashi, Phys. Rev. Applied 14, 064027 (2020).

  5. Effects of the atomic order on the half-metallic electronic structure in the Co2Fe(Ga0.5Ge0.5) Heusler alloy thin film
    K. Goto, L. S. R. Kumara, Y. Sakuraba, Y. Miura, I. Kurniawan, A. Yasui, H. Tajiri, Y. Fujita, Z. Chen, and K. Hono, Phys. Rev. Materials 4, 114406 (2020).

  6. Interfacial resonant tunneling induced by folded bands and providing highly spin-polarized current in spinel-oxide barrier junctions
    K. Nawa, K. Masuda, and Y. Miura, Phys. Rev. B 102, 144423 (2020).

  7. Laser-induced terahertz emission in Co2MnSi/Pt structure
    Y. Sasaki, Y. Takahashi, S. Kasai, Appl. Phys. Express 13, 093003 (2020).

  8. Interlayer Exchange Coupling Modulated All-Optical Magnetic Switching in Synthetic Ferrimagnetic Heterostructures
    J. Wang, S. Sugimoto, S. Kasai, Y.K. Takahashi, J. Phys. D: Appl. Phys. 53, 475002 (2020).

  9. Spin injection efficiency through the pumping in epitaxial Co2MnSi/Pt thin film
    Y. Sasaki, S. Sugimoto, Y. K. Takahashi, S. Kasai, AIP Adv. 10, 085311 (2020).

  10. Multiple modes of a single spin torque oscillator under the non-linear region
    S. Sugimoto, S. Iwakiri, Y. Kozuka, Y. Takahashi, Y. Niimi, K. Kobayashi, S. Kasai, AIP Adv. 10, 075115 (2020).

  11. Temperature-dependent spin polarization of Heusler Co2MnSi from the disordered local-moment approach: Effects of atomic disordering and nonstoichiometry
    K. Nawa, I. Kurniawan, K. Masuda, Y. Miura, C. E. Patrick, and J. B. Staunton, Phys. Rev. B 102, 054424 (2020).

  12. Fully epitaxial giant magnetoresistive devices with half-metallic Heusler alloy fabricated on poly-crystalline electrode using three-dimensional integration technology
    J. Chen, Y. Sakuraba, K. Yakushiji, Y. Kurashima, N. Watanabe, J. Liu, S. Li, A. Fukushima, H. Takagi, K. Kikuchi, S. Yuasa, K. Hono, Acta Mater. 200, 1038-1045 (2020).

  13. Machine learning analysis of tunnel magnetoresistance of magnetic tunnel junctions with disordered MgAl2O4
    S. Ju, Y. Miura, K. Yamamoto, K. Masuda, K. Uchida, and J. Shiomi, Phys. Rev. Research 2, 023187 (2020).

  14. Nonlocal accumulation, chemical potential, and Hall effect of skyrmions in Pt/Co/Ir heterostructure
    S. Sugimoto, W. Koshibae, S. Kasai, N. Ogawa, Y. Takahashi, N. Nagaosa & Y. Tokura, Sci. Rep. 10, 1009 (2020).

  15. Creation of magnetic skyrmions by surface acoustic waves
    T. Yokouchi, S. Sugimoto, B. Rana, S. Seki, N. Ogawa, S. Kasai & Y. Otani, Nat. Nanotechnol. 15, 361–366 (2020).

  16. Optimization of ruthenium as a buffer layer for non-collinear antiferromagnetic Mn3X films
    S. Kurdi, P. Zilske, X.D. Xu, M. Frentrup, M.E. Vickers, Y. Sakuraba, G. Reiss, Z.H. Barber, and J.W. Koo, J. Appl. Phys. 127, 165302 (2020).

  17. Interface-driven giant tunnel magnetoresistance in (111)-oriented junctions
    K. Masuda, H. Itoh, and Y. Miura, Phys. Rev. B 101, 144404 (2020).

  18. Graphene/Half-Metallic Heusler Alloy: A Novel Heterostructure toward High-Performance Graphene Spintronic Devices
    S. Li, K.V. Larionov, Z. Popov, T. Watanabe, K. Amemiya, S. Entani, P.V. Avramov, Y. Sakuraba, H. Naramoto, P.B. Sorokin, S. Sakai, Adv. Mater. 32, 1905734 (2020).

  19. Contributions of magnetic structure and nitrogen to perpendicular magnetocrystalline anisotropy in antiperovskite ɛ−Mn4N
    S. Isogami*, K. Masuda*, and Y. Miura, Phys. Rev. Materials 4, 014406 (2020). (*equal contribution)

  20. Spin-orbit torques in antiperovskite Fe4N pseudo-single-crystal films with negative spin polarization
    S. Isogami, J. Magn. Magn. Mater. 501, 166400 (2020).

  21. Effect of tungsten doping on perpendicular magnetic anisotropy and its voltage effect in single crystal Fe/MgO(001) interfaces
    Y. Iida, Q. Xiang, J. Okabayashi, T. Scheike, H. Sukegawa and S. Mitani, J. Phys. D: Appl. Phys. 53, 124001 (2020).

  22. Comparative study of spin-dependent transport in Co2FeAl/MgAl2O4/CoFe magnetic tunnel junctions with and without thin CoFe interface insertion: An elastic and inelastic scattering model analysis
    T. Scheike, H. Sukegawa, T. Ohkubo, K. Hono and S. Mitani, J. Phys. D: Appl. Phys. 53, 045001 (2020).

Spin Caloritronics:

  1. Thermal transport properties of Ni-Co-based superalloy
    A. Miura, T. Osada, K. Kawagishi, and K. Uchida, AIP Adv. 10, 125118 (2020).

  2. Non-contact imaging detection of thermal Hall effect signature by periodic heating method using lock-in thermography
    K. Tomioka, K. Uchida, R. Iguchi, and H. Nagano, J. Appl. Phys. 128, 215103 (2020).

  3. Spin-polarized Weyl cones and giant anomalous Nernst effect in ferromagnetic Heusler films
    K. Sumida, Y. Sakuraba, K. Masuda, T. Kono, M. Kakoki, K. Goto, W. Zhou, K. Miyamoto, Y. Miura, T. Okuda & A. Kimura, Comms. Mater. 1, 89 (2020).

  4. Large spin-Hall effect in non-equilibrium binary copper alloys beyond the solubility limit
    H. Masuda, R. Modak, T. Seki, K. Uchida, Y.-C. Lau, Y. Sakuraba, R. Iguchi, and K. Takanashi, Comms. Mater. 1, 75 (2020).

  5. Thickness dependence of spin Peltier effect visualized by thermal imaging technique
    S. Daimon, K. Uchida, N. Ujiie, Y. Hattori, R. Tsuboi, and E. Saitoh, Appl. Phys. Express 13, 103001 (2020).

  6. Dynamic electrical pathway tuning in neuromorphic nanowire networks
    Q. Li, A. Diaz-Alvarez, R. Iguchi, J. Hochstetter, A. Loeffler, R. Zhu, Y. Shingaya, Z. Kuncic, K. Uchida, and T. Nakayama, Adv. Funct. Mater. 30, 2003679 (2020).

  7. High-temperature dependence of anomalous Ettingshausen effect in SmCo5-type permanent magnets
    A. Miura, K. Masuda, T. Hirai, R. Iguchi, T. Seki, Y. Miura, H. Tsuchiura, K. Takanashi, and K. Uchida, Appl. Phys. Lett. 117, 082408 (2020).

  8. Observation of the Magneto-Thomson Effect
    K. Uchida, M. Murata, A. Miura, and R. Iguchi, Phys. Rev. Lett. 125, 106601 (2020).

  9. Perpendicularly magnetized Ni/Pt (001) epitaxial superlattice
    T. Seki, M. Tsujikawa, K. Ito, K. Uchida, H. Kurebayashi, M. Shirai, and K. Takanashi, Phys. Rev. Materials 4, 064413 (2020).

  10. Simultaneous direct measurements of conventional and inverse magnetocaloric effects in Ni-Mn-based Heusler alloys using lock-in thermography technique
    R. Modak, R. Iguchi, H. Sepehri-Amin, A. Miura, and K. Uchida, AIP Adv. 10, 065005 (2020).

  11. Enhancement of charge-to-spin current conversion in a Ni/Pt bilayer film detected by spin Peltier effect
    T. Yamazaki, R. Iguchi, H. Nagano and K. Uchida, Jpn. J. Appl. Phys. 59, 050901 (2020).

  12. Giant anomalous Nernst effect in the Co2MnAl1−xSix Heusler alloy induced by Fermi level tuning and atomic ordering
    Y. Sakuraba, K. Hyodo, A. Sakuma, and S. Mitani, Phys. Rev. B 101, 134407 (2020).

  13. Strain-induced enhancement of the Seebeck effect in magnetic tunneling junctions via interface resonant tunneling: Ab initio study
    K. Yamamoto, K. Masuda, K. Uchida, and Y. Miura, Phys. Rev. B 101, 094430 (2020).

  14. Spin-mediated charge-to-heat current conversion phenomena in ferromagnetic binary alloys
    A. Miura, R. Iguchi, T. Seki, K. Takanashi, and K. Uchida, Phys. Rev. Materials 4, 034409 (2020).

  15. Heat flux sensing by anomalous Nernst effect in Fe–Al thin films on a flexible substrate
    W. Zhou and Y. Sakuraba, Appl. Phys. Express 13, 043001 (2020).

  16. Transient response of the spin Peltier effect revealed by lock-in thermoreflectance measurements
    T. Yamazaki*, R. Iguchi*, T. Ohkubo, H. Nagano, and K. Uchida, Phys. Rev. B 101, 020415(R) (2020). (*equal contribution)

  17. Enhancement of temperature change induced by anomalous Ettingshausen effect in thin Ni films on suspended membrane substrates
    R. Modak and K. Uchida, Appl. Phys. Lett. 116, 032403 (2020).

  18. Magneto-optical painting of heat current
    J. Wang, Y.K. Takahashi, K. Uchida, Nat. Commun. 11, 2 (2020).

Nanostructure Analysis:

(Methods or other materials except for magnetic and spintronic materials)
  1. Combined APT and STEM Analyses
    A. Kumar and T. Ohkubo, AIP Book, Characterization of Defects and Deep Levels for GaN Power Devices, Chapter 5 (2020).

  2. Fabrication of a novel magnetic topological heterostructure and temperature evolution of its massive Dirac cone
    T. Hirahara, M. M. Otrokov, T. Sasaki, K. Sumida, Y. Tomohiro, S. Kusaka, Y. Okuyama, S. Ichinokura, M. Kobayashi, Y. Takeda, K. Amemiya, T. Shirasawa, S. Ideta, K. Miyamoto, K. Tanaka, S. Kuroda, T. Okuda, K. Hono, S. V. Eremeev, and E. V. Chulkov, Nat. Commun. 11, 4821 (2020).

  3. Effect of recovery and recrystallization on microstructure and magnetic properties of Fe-0.4P rolled sheets
    R. Gautam, R. Rani, D. Prabhu, V. Chandrasekaran, T.T. Sasaki, K. Hono, G. Sundararajan, R. Gopalan, Mater. 13, 100863 (2020).

  4. Role of Zn on the room temperature formability and strength in Mg–Al–Ca–Mn sheet alloys
    Z.H. Li, T.T. Sasaki, M.Z. Bian, T. Nakata, Y. Yoshida, N. Kawabe, S. Kamado, K. Hono, J. Alloys Compd. 847, 156347 (2020).

  5. Influence of implanted Mg concentration on defects and Mg distribution in GaN
    A. Kumar, W. Yi, J. Uzuhashi, T. Ohkubo, J. Chen, T. Sekiguchi, R. Tanaka, S. Takashima, M. Edo and K. Hono, J. Appl. Phys. 128, 065701 (2020).

  6. Face-selective tungstate ions drive zinc oxide nanowire growth direction and dopant incorporation
    J. Liu, K. Nagashima, H. Yamashita, W. Mizukami, J. Uzuhashi, T. Hosomi, M. Kanai, X. Zhao, Y. Miura, G. Zhang, T. Takahashi, M. Suzuki, D. Sakai, B. Samransuksamer, Y. He, T. Ohkubo, T. Yasui, Y. Aoki, J.C. Ho, Y. Baba & T. Yanagida, Comms. Mater. 1, 58 (2020).

  7. Suppression of Sulfur Segregation at Scale/Substrate Interface for Sixth-Generation Single-Crystal Ni-Base Superalloy
    K. Kawagishi, C. Tabata, T. Sugiyama, T. Yokokawa, J. Uzuhashi, T. Ohkubo, Y. Takata, M. Yuyama, S. Suzuki, H. Harada, Superalloys 2020, 798-803 (2020). (The 14th International Symposium on Superalloys)

  8. Hierarchical microstructure strengthening in a single crystal high entropy superalloy
    Y-T. Chen, Y-J. Chang, H. Murakami, T. Sasaki, K. Hono, C-W. Li, K. Kakehi, J-W. Yeh & A-C. Yeh, Sci. Rep. 10, 12163 (2020).

  9. Mg diffusion and activation along threading dislocations in GaN
    W. Yi, A. Kumar, J. Uzuhashi, T. Kimura, R. Tanaka, S. Takashima, M. Edo, Y. Yao, Y. Ishikawa, J. Chen, T. Ohkubo, T. Sekiguchi, and K. Hono, Appl. Phys. Lett. 116, 242103 (2020).

  10. Electron-Beam-Induced Current Study of Dislocations and Leakage Sites in GaN Schottky Barrier Diodes
    J. Chen, W. Yi, A. Kumar, A. Iwanade, R. Tanaka, S. Takashima, M. Edo, S. Ito, T. Kimura, T. Ohkubo & T. Sekiguchi, J. Electron. Mater. 49, 5196-5204 (2020). (18th Conference on Defects-Recognition, Imaging and Physics in Semiconductors (DRIP XVIII))

  11. Ultra-high Voltage-Controlled Magnetic Anisotropy and Interface Magnetoelectric Effect in Perpendicular Cr/Mo/CoFeB/MgO Multilayers
    L. Wang, X. Li, T.T. Sasaki, K. Wong, G.Q. Yu, S.Z. Peng, C. Zhao, T. Ohkubo, K. Hono, W. Zhao, K.L. Wang, Sci. China Phys. Mech. Astron. 63, 277512 (2020).

  12. Simultaneous achievement of high thermal conductivity, high strength and formability in Mg-Zn-Ca-Zr sheet alloy
    Z.H. Li, T.T. Sasaki, T. Shiroyama, A. Miura, K. Uchida, K. Hono, Mater. Res. Lett. 8, 335-340 (2020).

  13. Effects of Zn Additions on the Room Temperature Formability and Strength in Mg-1.2Al-0.5Ca-0.4Mn Alloy Sheets
    Z.H. Li, T.T. Sasaki, M.Z. Bian, T. Nakata, Y. Yoshida, N. Kawabe, S. Kamado, K. Hono, Magnesium Technology 2020, 105-111 (2020). (The Magnesium Technology 2020 symposium)

  14. マグネシウム合金の析出強化技術
    佐々木泰祐、『マグネシウム合金の最先端技術と応用展開』 pp 33-39 (監修 河村能人、千野靖正、シーエムシー出版 2020年)

  15. A controllable and efficient method for the fabrication of a single HfC nanowire field-emission point electron source aided by low keV FIB milling
    S. Tang, J. Tang, T-W. Chiu, J. Uzuhashi, D-M. Tang, T. Ohkubo, M. Mitome, F. Uesugi, M. Takeguchi and L-C. Qin, Nanoscale 12, 16770-16774 (2020).

  16. A HfC nanowire point electron source with oxycarbide surface of lower work function for high-brightness and stable field-emission
    S. Tang, J. Tang, T-W. Chiu, W. Hayami, J. Uzuhashi, T. Ohkubo, F. Uesugi, M. Takeguchi, M. Mitome and L-C. Qin, Nano Res. 13, 1620-1626 (2020).

  17. Characterizations of GaN nanowires and GaInN/GaN multiquantum shells grown by MOVPE
    N. Goto, W. Lu, H. Murakami, M. Terazawa, J. Uzuhashi, T. Ohkubo, K. Hono, S. Kamiyama, T. Takeuchi, M. Iwaya and I. Akasaki, Jpn. J. Appl. Phys. 59, SGGE05 (2020).

Other Fields:

  1. Microwave response of interacting oxide two-dimensional electron systems
    D. Tabrea, I.A. Dmitriev, S.I. Dorozhkin, B.P. Gorshunov, A.V. Boris, Y. Kozuka, A. Tsukazaki, M. Kawasaki, K. von Klitzing, J. Falson, Phys. Rev. B 102, 115432 (2020).

  2. Magnetic structure and phase transition at the surface region of Fe3O4(100)
    T. Kawauchi, Y. Miura, K. Asakawa, and K. Fukutani, J. Phys. Commun. 4, 115001 (2020).

  3. Anharmonic lattice dynamics and thermal transport of monolayer InSe under equibiaxial tensile strains
    Z. Zeng, S. Li, T. Tadano, and Y. Chen, J. Phys. Condens. Matter 32, 475702 (2020).

  4. Detecting quadrupole: a hidden source of magnetic anisotropy for Manganese alloys
    J. Okabayashi, Y. Miura, Y.Kota, K. Z. Suzuki, A. Sakuma, and S. Mizukami, Sci. Rep. 10, 1038 (2020).

  5. Off-stoichiometry effect on magnetic damping in thin films of Heusler alloy Co2MnSi
    T. Li, W. Yan, X. Zhang, B. Hu, K. Moges, T. Uemura, M. Yamamoto, M. Tsujikawa, M. Shirai, and Y. Miura, Phys. Rev. B 101, 174410 (2020).

  6. Enargite Cu3PS4: A Cu-S-Based Thermoelectric Material with a Wurtzite-Derivative Structure
    T. Tanimoto, K. Suekuni, T. Tanishita, H. Usui, T. Tadano, T. Kamei, H. Saito, H. Nishiate, C. H. Lee, K. Kuroki, and M. Ohtaki, Adv. Funct. Mater. 30, 2000973 (2020).

  7. Anharmonicity Explains Temperature Renormalization Effects of the Band Gap in SrTiO3
    Y. Wu, W. A. Saidi, J. K. Wuenschell, T. Tadano, P. Ohodnicki, B. Chorpening, and Y. Duan, J. Phys. Chem. Lett. 11, 2518-2523 (2020).

  8. Quantum crystal structure in the 250-kelvin superconducting lanthanum hydride
    I. Errea, F. Belli, L. Monacelli, A. Sanna, T. Koretsune, T. Tadano, Raffaello Bianco, M. Calandra, R. Arita, F. Mauri, and J. A. Flores-Livas, Nature 578, 66-69 (2020).

  9. Materials design of dynamically stable d9 layered nickelates
    M. Hirayama, T. Tadano, Y. Nomura, and R. Arita, Phys. Rev. B 101, 075107 (2020).
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