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三浦良雄グループリーダーが日本磁気学会「優秀研究賞」を受賞しました。受賞の対象となった研究は「磁気接合系におけるスピン依存伝導に関する理論的研究」です。「優秀研究賞」(MSJ Outstanding Research Award)は「一連の研究を通して本学会の発展に貢献があった人に授与する賞」(日本磁気学会HPより)です。
  • 第16回凝縮系科学賞受賞者業績紹介 - 只野央将 -
  •   2021.02.24
    An article, “Interfacial giant tunnel magnetoresistance and bulk-induced large perpendicular magnetic anisotropy in (111)-oriented junctions with fcc ferromagnetic alloys: A first-principles study” was published on 22nd February 2021, in Physical Review B. It may be accessed from the following link:
  • DOI:10.1103/PhysRevB.103.064427
  • In this work, Masuda et al. theoretically found that unconventional (111)-oriented magnetic tunnel junctions consisting of L11-ordered fcc ferromagnetic alloys and MgO barrier have both high tunnel magnetoresistance ratios and large perpendicular magnetic anisotropy, which are essential for the application to magnetic random access memories.
    An article, “Interface-driven giant tunnel magnetoresistance in (111)-oriented junctions” was published on 6th April 2020, in Physical Review B. It may be accessed from the following link:
  • DOI:10.1103/PhysRevB.101.144404
  • In this work, Masuda et al. theoretically predicted unprecedentedly large TMR based on a new mechanism in unconventional (111)-oriented magnetic tunnel junctions (MTJs). Through the first-principles transport calculation, they found that in the Co/MgO/Co(111) MTJ, the interfacial d-p antibonding states are formed close to the Fermi level and their resonance (so-called “interfacial resonance”) yields a quite high TMR ratio. This is in sharp contrast to the case of conventional (001)-oriented MTJs, where bulk electronic states mainly contribute to TMR. These findings not only advance the fundamental understanding on TMR but also give a new insight to experimentally explore wider range of MTJs for higher TMR ratios.
  • 《プレスリリース》ほぼ室温超伝導を示す高圧下ランタン水素は量子固体だった~予測より低い圧力で超伝導になる理由を理論的に説明 低圧での室温超伝導実現へ道筋~
  • Nature 578, 66–69 (2020) | DOI : 10.1038/s41586-020-1955-z
  •   2019.09.23
  • Jpn. J. Appl. Phys. 56, 020306 (2017) | DOI : 10.7567/JJAP.56.020306

  •   2019.04.01
    理論による新規磁性物理現象の解明とその応用により革新的な技術を創成することを目指した研究を推進するため、磁性理論グループ(Spin Theory Group)が、磁性・スピントロニクス材料研究拠点内に新たに発足しました。
    "Spin Theory Group" is newly‐organized in the center.