Publication 2013

Publication 2013

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:

  • High-coercivity ultrafine-grained anisotropic Nd-Fe-B magnets processed by hot deformation and the Nd-Cu grain boundary diffusion process
    H. Sepehri-Amin, T. Ohkubo, S. Nagashima, M. Yano, T. Shoji, A. Kato, T. Schrefl, K. Hono, Acta Mater. 61, 6622 - 6634 (2013).

  • Microstructure and Magnetic Properties of FePt-MOx Granular Films
    T. Shiroyama, T. Abe, Y. K. Takahashi, and K. Hono, IEEE Trans. Magn. 49, 3616 (2013).

  • Enhancement of coercivity of hot-deformed Nd-Fe-B anisotropic magnet by low-temperature grain boundary diffusion of Nd60Dy20Cu20 eutectic alloy
    H. Sepehri-Amin, J. Liu, T. Ohkubo, K. Hioki, A. Hattori, K. Hono, Scripta Mater. 69, 647-650 (2013).

  • FePt nanogranular films for high density heat-assisted magnetic recording
    K. Hono, Materials Matters 8, 36 (2013).
    (The paper is downloadable for free of charge.)

  • Microstructure Control of L10-Ordered FePt Granular Film for Heat-Assisted Magnetic Recording (HAMR) Media
    B. S. D. Ch. S. Varaprasad, Y. K. Takahashi, and K. Hono, JOM 65, 853 - 861 (2013).


  • Effect of Nd content on the microstructure and coercivity of hot-deformed Nd-Fe-B permanent magnets
    J. Liu, H. Sepehri-Amin, T. Ohkuboa, K. Hioki, A. Hattori, T. Schrefl, and K. Hono, Acta Mater. 61, 5387 - 5399 (2013).

  • Electrically conductive (Mg0.2Ti0.8)O underlayer to grow FePt-based perpendicular recording media on glass substrates
    B. S. D. Ch. S. Varaprasad, Y. K. Takahashi, A. Ajan, K. Hono, J. Appl. Phys. 113, 203907 (2013).

  • L10-ordered FePt-based perpendicular magnetic recording media for heat-assisted magnetic recording
    Varaprasad, B.S.D.Ch.S., Chen, M., Takahashi, Y.K., Hono, K.; IEEE Trans. Magn. 49, 718-722 (2013).

  • High coercivity Nd-Fe-B thick films without heavy rare earth additions
    N. M. Dempsey, T.G. Woodcock, H. Sepehri-Amin, Y. Zhang, H. Kennedy, D. Givord, K. Hono and O. Gutfleisch, Acta Mater. 61, 4920 - 4927 (2013).

  • The mechanism of coercivity enhancement by the grain boundary diffusion process of Nd-Fe-B sintered magnets
    H. Sepehri-Amin, T. Ohkubo, K. Hono; Acta Mater. 61, 1982-1990 (2013).

  • Coercivity enhancement of rapidly solidified Nd-Fe-B magnet powders
    H. Sepehri-Amin, D. Prabhu, M. Hayashi, T. Ohkubo, K. Hioki, A. Hattori, K. Hono, Scripta Mater. 68, 167-170 (2013).

  • The origin of the coercivity reduction of Nd-Fe-B sintered magnet annealed below an optimal temperature
    T. Akiya, T.T. Sasaki, T. Ohkubo, Y. Une, M. Sagawa, H. Kato, K. Hono, Journal of Magnetism and Magnetic Materials 342, 4-10 (2013).

  • Correlative multi-scale characterization of a fine grained Nd-Fe-B sintered magnet
    T.T. Sasaki, T. Ohkubo, K. Hono, Y. Une, M. Sagawa;
    Ultramicroscopy 132, 222-226 (2013).
  • Spintronic Materials:

  • Real-time observation of electrical vortex core switching
    K. Nakano, K. Tanabe, R. Hiramatsu, D. Chiba, N. Ohshima, S. Kasai, T. Sato, Y. Nakatani, K. Sekiguchi, K. Kobayashi and T. Ono, Appl. Phys. Lett. 102, 072405 (2013).

  • Pressure-enhanced giant magnetoresistance in Fe/Cr magnetic multilayers
    G. Oomi, S. Higashihara, K. Suenaga, K. Saito, K. Takanashi and S. Mitani, J. Korean Phys. Soc. 62, 1929-1932 (2013).


  • Ion-irradiation enhancement of materials degradation in Fe-Cr single crystals detected by magnetic technique
    Y. Kamada, H. Watanabe, S. Mitani, J. N. Mohapatra, H. Kikuchi, S. Kobayashi, M. Mizuguchi and K. Takanashi, J. Nuclear Mater. 442, S861-S864 (2013).


  • Real-time observation of electrical vortex core switching
    K. Nakano, K. Tanabe, R. Hiramatsu, D. Chiba, N. Ohshima, S. Kasai, T. Sato, Y. Nakatani, K. Sekiguchi, K. Kobayashi and T. Ono, Appl. Phys. Lett. 102, 072405 (2013).

  • Low-resistive monocrystalline Mg-Al-O barrier magnetic tunnel junctions for spin-transfer magnetization switching
    H. Sukegawa, S. Mitani , T. Ohkubo , K. Inomata and K. Hono, Appl. Phys. Lett. 103, 142409 (2013).

  • Large anisotropic Fe orbital moments in perpendicularly magnetized Co2FeAl Heusler alloy thin films revealed by angular-dependent x-ray magnetic circular dichroism
    J. Okabayashi, H. Sukegawa, Z. Wen, K. Inomata and S. Mitani, Appl. Phys. Lett. 103, 102402 (2013).

  • Enhanced interface perpendicular magnetic anisotropy in Ta-CoFeB-MgO using nitrogen doped Ta underlayers.
    J. Sinha, M. Hayashi, A. Kellock, S. Fukami, M. Yamanouchi, H. Sato, S. Ikeda, S. Mitani, S. Yang, S. S. P. Parkin and H. Ohno, Appl. Phys. Lett. 102, 242405 (2013).

  • Layer thickness dependence of the current induced effective field vector in Ta|CoFeB|MgO.
    J. Kim, J. Sinha, M. Hayashi, M. Yamanouchi, S. Fukami, T. Suzuki, S. Mitani, and H. Ohno, Nature Mater. 12, 240 (2013).

  • <001> textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy
    Ye Du, B. S. D. Ch. S. Varaprasad, Y. K. Takahashi, T. Furubayashi and K. Hono, Appl. Phys. Lett. 103, 202401 (2013).

  • Temperature dependence of magnetoresistive output of pseudo spin valves with Co2Fe(Al1-xSix) Heusler alloys and a Ag spacer
    T. Furubayashi, T. M. Nakatani, H. S. Goripati, H. Sukegawa, Y. K. Takahashi, K. Inomata and K. Hono, J. Appl. Phys. 114, 123910 (2013).

  • Large perpendicular magnetic anisotropy at Fe/MgO interface
    J. W. Koo, S. Mitani, T. T. Sasaki, H. Sukegawa, Z. C. Wen, T. Ohkubo, T. Niizeki, K. Inomata and K. Hono, Appl. Phys. Lett. 103, 192401 (2013).

  • Growth of a High-Quality Ultrathin Fe(001) Layer on MgO(001) by Insertion of an Ultrathin Fe2O3 Layer
    T. Nozaki, T. Ohkubo, Y. Shiota, H. Kubota, A. Fukushima, K. Hono, Y. Suzuki, and S. Yuasa, Appl. Phys. Express 6, 113004 (2013).

  • Current-perpendicular-to-plane giant magnetoresistance in pseudo spin valves with Co2Fe(Ge0.5Ga0.5) Heusler alloy ferromagnetic layers and Cu/Ag spacer
    S. Li, H. S. Goripati, Y. K. Takahashi, T. Furubayashi, and K. Hono, IEEE Trans. Magn. 49, 4413 (2013).

  • Polycrystalline current-perpendicular-to-plane giant magnetoresistance pseudo spin-valves using Co2Mn(Ga0.25Ge0.75) Heusler alloy
    Ye Du, T. M. Nakatani, Y. K. Takahashi, N. Hase, T. Furubayashi, and K. Hono, J. Appl. Phys. 114, 053910 (2013).

  • Enhancement of giant magnetoresistance by L21 ordering in Co2Fe(Ge0.5Ga0.5) Heusler alloy current-perpendicular-to-plane pseudo spin valves
    S. Li, Y. K. Takahashi, T. Furubayashi and K. Hono, Appl. Phys. Lett. 103, 042405 (2013).

  • Structure and magnetoresistance of current-perpendicular-to-plane pseudo spin valves using Co2Mn(Ga0.25Ge0.75) Heusler alloy
    Y. K. Takahashi, N. Hase, M. Kodzuka, A. Itoh, T. Koganezawa, T. Furubayashi, S. Li, B. S. D. Ch. S. Varaprasad, T. Ohkubo, and K. Hono, J. Appl. Phys. 113, 223901 (2013).

  • Structure and magnetoresistive properties of current-perpendicular-to-plane pseudo-spin valves using polycrystalline Co2Fe-based Heusler alloy films
    T.M. Nakatani, Ye Du, Y.K. Takahashia, T. Furubayashi, K. Hono, Acta Mater. 61, 3695 (2013).

  • ハードディスクドライブ用磁気センサー応用を目指したホイスラー合金CPP-GMR 素子の研究
    中谷友也、高橋有紀子、古林孝夫、宝野和博まてりあ 52, No.3, 99 - 107 (2013).


  • Current-perpendicular-to-plane giant magnetoresistance using Co2Fe(Ga1-xGex) Heusler alloy
    H. S. Goripati, T. Furubayashi, Y. K. Takahashi, and K. Hono;
    J. Appl. Phys. 113, 043901 (2013).
  • Nanostructure Analysis:

  • Atom probe analysis on interaction between Cr and N in bake-hardening steels with anti-aging properties at RT
    J. Takahashi, N. Maruyama, K. Kawakami, N. Yoshinaga, M. Sugiyama, T. Ohkubo, D. H. Ping, K. Hono, Mater. Sci. Eng. A 585, 100 (2013).

  • Effect ofextrusionconditionsonmicrostructureandmechanical properties of microalloyed Mg-Sn-Al-Zn alloys
    F.R. Elsayed, T.T. Sasaki, T. Ohkubo, H. Takahashi, S. W. Xu, S. Kamado, and K. Hono, Mater. Sci. Eng. A 588, 318 - 328 (2013).

  • Origin of intergranular fracture in martensitic 8Mn steel at cryogenic temperatures
    K.H. Kwon, I.-C. Yi, Y. Ha, K.-K. Um, J.-K. Choi, K. Hono, K. Oh-ishi, and Nack J. Kim, Scripta Mater. 69, 420 - 423 (2013).

  • Compositional optimization of Mg-Sn-Al alloys for higher age hardening response
    F.R. Elsayed, T.T. Sasaki, C.L. Mendis, T. Ohkubo, K. Hono, Mater. Sci. Eng. A 566, 22 - 29 (2013).

  • Evidence for nano-Si clusters in amorphous SiO anode materials for rechargeable Li-ion batteries
    H. Sepehri-Amin, T. Ohkubo, M. Kodzuka, H. Yamamura, T. Saito, H. Iba and K. Hono, Scripta Mater. 69, 92 (2013).

  • The effect of Ag and Ca additions on the age hardening response of Mg-Zn alloys
    T. Bhattacharjee, C.L. Mendis, K. Oh-ishi, T. Ohkubo, K. Hono, Mat. Sci. Eng. A 575, 231 (2013).

  • High-pressure torsion for enhanced atomic diffusion and promoting solid-state reactions in the aluminum-copper system
    K. Oh-ishi, K. Edalati, H. S. Kim, K. Hono, and Z. Horita, Acta Mater. 61, 3482 (2013).

  • Significant enhancement of age hardening response in Mg-10Sn-3Al-1Zn alloy by Na microalloying
    F.R. Elsayed, T.T. Sasaki, C.L. Mendis, T. Ohkubo, and K. Hono; Scripta Mater. 68, 797-800 (2013).
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