Publication 2025

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National Institute for Material Science

Publication 2025

* Sorted by Research Fields.

Magnetic Materials:

  1. Ultrathin CoPt alloy films with fcc (111) orientation and perpendicular magnetic anisotropy fabricated by electrodeposition
    D. Araki, Y. Sonobe, Y.K. Takahashi, T. Homma, Electrochem. Commun. 176, 107938 (2025).

  2. Thermal spin-torque heat-assisted magnetic recording
    S. Isogami, Y. Sasaki, Y. Fan, Y. Kubota, J. Gadbois, K. Hono, and Y.K. Takahashi, Acta Mater. 286, 120743 (2025).

  3. Multiprobe analyses on nucleation and evolution of nanocrystallization process in a high saturation magnetization soft magnetic Fe-Si-B-P-Cu-C alloy
    S. Hiramoto, S. Okamoto, J. Uzuhashi, T. Ohkubo, A. Toda, S. Kim, C. Moriyoshi, and Y. Kuroiwa, J. Mater. Sci. 60, 3988–3998 (2025).

  4. Heavy rare earth-free high resistivity and coercivity Nd-Fe-B hot-deformed magnet developed by Pr-Cu diffusion and CaF2-LiF eutectic addition
    Z.H. Kautsar, H. Sepehri-Amin, Xin Tang, N. Kulesh, T.T. Sasaki, T. Ohkubo, and K. Hono, J. Alloys Compd. 1010, 177738 (2025).

  5. Effect of Co on twin formation and magnetic properties of Sm(Fe,Ti,V)12 alloys
    P. Tozman, G. Hrkac, J. B. Staunton, T. Saito, T.T. Sasaki, T. Ohkubo, H. Sepehri-Amin, Scr. Mater. 258, 116491 (2025).

  6. Development of L10-ordered FePt with low damping and large perpendicular magnetic anisotropy by engineering the nanostructure
    P.D. Bentley, Y. Sasaki, I. Suzuki, S. Isogami, Y.K. Takahashi, H. Suto, Appl. Phys. Lett. 126, 022404 (2025).

  7. Combinatorial sputtering synthesis of TbCu7-type Sm-Fe based compounds: a study on phase, composition, and extrinsic magnetic properties
    A.R. Dilipan, H. Sepehri-Amin, R. Modak, V.K. Kushwaha, Y. Sakuraba, K. Uchida, K. Hono, Y.K. Takahashi, J. Alloys Compd. 1010, 177723 (2025).

Spintronic Materials:

  1. Reversal of Spin-Torque Polarity with Inverting Current Vorticity in Composition-Graded Layer at the Ti/W Interface
    H. Nakayama, T. Horaguchi, J. Uzuhashi, C. He, H. Sukegawa, T. Ohkubo, S. Mitani, K. Yamanoi, and Y. Nozaki, Adv. Electron. Mater., 2400797 (2025).

  2. Interface perpendicular magnetic anisotropy in heterostructures consisting of CoFeB and conductive rock-salt Li-Ti-O
    H. Koizumi, Z. Wen, J. Uzuhashi, T. Ohkubo, H. Sukegawa and S. Mitani, J. Phys. D: Appl. Phys. 58, 16LT01 (2025).

  3. Impact of GdOx insertion on magnetic anisotropy and damping in double-barrier magnetic stacks
    J. Kim, T. Nozaki, J. Uzuhashi, S. Tamaru, T. Ichinose, T. Ochiai, T. Yamamoto, T. Ohkubo, K. Yakushiji and S. Yuasa, APL Mater. 13, 031102 (2025).

  4. Enhanced tunnel magnetoresistance of Fe/MgGa2O4/Fe(001) magnetic tunnel junctions by interface-tuning with atomic scale MgO insertion layers  Editor's Pick 
    R. Sihombing, T. Scheike, J. Uzuhashi, T. Ohkubo, Z. Wen, S. Mitani, and H. Sukegawa, Appl. Phys. Lett. 126, 022407 (2025).

  5. High-throughput evaluation of half-metallicity of Co2MnSi Heusler alloys using composition-spread films and spin-integrated hard X-ray photoelectron spectroscopy
    R. Toyama, S. Tsuda, Y. Iwasaki, T.D. Phan, S. Yamamoto, H. Yamane, K. Yaji and Y. Sakuraba, Sci. Tech. Adv. Mater. 26, 2439781 (2025).

Spin Caloritronics:

  1. Multifunctional composite magnet realizing record-high transverse thermoelectric generation
    F. Ando, T. Hirai, A. Alasli, H. Sepehri-Amin, Y. Iwasaki, H. Nagano, and K. Uchida, Energy Environ. Sci. , Published Online (2025).

  2. Quantitative noncontact measurement of thermal Hall angle and transverse thermal conductivity by lock-in thermography
    T. Imamura, T. Hirai, K. Oyanagi, R. Iguchi, K. Takamori, S. Kobayashi, and K. Uchida, Phys. Rev. Appl. 23, 024018 (2025).

  3. Measurements of in-plane thermophysical properties on nanoscale-thick films by lock-in thermography
    A. Alasli, R. Iguchi, K. Uchida, and H. Nagano, Appl. Phys. Lett. 126, 044102 (2025).

  4. Enhancement of thermodynamic efficiency in active magnetic refrigeration using sinusoidal wavy structures
    T.-A. Nguyen, R. Takata, K. Uchida, and H. Nagano,, Int. J. Heat Mass Transf. 240, 126654 (2025).

Nanostructure Analysis:

(Methods or other materials except for magnetic and spintronic materials)
  1. Structural, optical, transport, and electronic properties of MgxZn1-xO (0 ≤ x ≤ 0.38) films pseudomorphically grown on Zn-polar ZnO substrates
    Y. Kozuka, S. Tsuda, T. Phan, K. Yaji, J. Uzuhashi, T. Ohkubo, T. Hiroto, T. Makino, J. Falson, A. Tsukazaki, M. Kawasaki, Mater. Today Quantum 6, 100036 (2025).

  2. Stable and high current emission of electrons from a HfC nanoneedle field-emitter fabricated by focused ion beam
    S. Tang, J. Tang, Y. Wu, Y-H. Chen, J. Uzuhashi, T. Ohkubo, M. Takeguchi, and L-C. Qin, Vacuum 238, 114224 (2025).

  3. Experimental investigation and simulation of SEM image intensity behaviors for developing thickness-controlled S/TEM lamella preparation via FIB-SEM
    J. Uzuhashi, Y. Yao, T. Ohkubo, and T. Sekiguchi, Microscopy, dfaf006 (2025).

  4. Effects of Al addition on Vickers hardness increase by thermal aging of Fe-Cr-Al alloys — evaluation by systematic experiments, machine learning modeling, and first-principles calculations
    Y. Abe, T. Tsuru, Y. Fujita, M. Ohtomo, T.T. Sasaki, S. Yamashita, N. Ohkubo, S. Ukai, J. Nucl. Mater. 606, 155606 (2025).

  5. Superimpositional design of crystallographic textures and macroscopic shapes via metal additive manufacturing - Game-change in component design
    T. Ishimoto, N. Morita, R. Ozasa, A. Matsugaki, O. Gokcekaya, S. Higashino, M. Tane, T. Mayama, K. Cho, H.Y. Yasuda, M. Okugawa, Y. Koizumi, M. Yoshiya, D. Egusa, T.T. Sasaki, E. Abe, H. Kimizuka, N. Ikeo, T. Nakano, Acta Mater. 286, 120709 (2025).

  6. Guinier-Preston (GP) zone strengthening of dilute magnesium alloys comprised of earth-abundant elements
    J.J. Bhattacharyya, S. Faberman, Z.H. Li, A. Sullivan, D. Cheng, B. Khoury, Y. Gao, T.T. Sasaki, B.C. Zhou, D. Warner, S.R. Agnew, Scr. Mater. 258, 116514 (2025).

  7. Characterization of δNi2Si Precipitates in Cu-Ni-Si Alloy by Small-angle X-ray Scattering, Small-angle Neutron Scattering, and Atom Probe Tomography
    H. Sasaki, S. Akiya, K. Mihara, Y. Oba, M. Onuma, J. Uzuhashi, and T. Ohkubo, Mater. Trans. 66, 44-49 (2025).

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