小谷 佳範(Yoshinori Kotani)

プロフィール
分光解析Ⅱグループ・ナノ分光チーム

研究員(技術担当)

メール: ykotani@spring8.or.jp


軟X線ビームラインであるBL25SUの担当者として利用実験のサポートと共同研究・開発を行っております。特に、磁性体の研究に欠かせない軟X線磁気円二色性(MCD)実験装置の改良、計測システムの構築など技術面に力を入れて活動しています。近年では強磁場走査型軟X線顕微鏡の開発を積極的に進め、磁性体の局所計測や顕微分光を目指した要素技術開発を行っています。また、元素戦略プロジェクト(磁性材料研究拠点)に参加し永久磁石試料の元素選択的イメージング、およびMCDイメージングに取り組んでいます。


外部機関所属先

  • 元素戦略磁性材料研究 研究員

キーワード

  • 軟X線イメージング
  • 顕微分光
  • 計測技術
研究成果

研究論文

     過去3年間分

    2018

  • “Antiferromagnetic domain wall creep driven by magnetoelectric effect”, Y. Shiratsuchi, H. Yoshida, T.V.A. Nguyen, Y. Kotani, K. Toyoki, T. Nakamura, and R. Nakatani, APL Materials, 6, 121104 (2018).
  • "Inserted metals for low-energy magnetoelectric switching in a Cr2O3/ ferromagnet interfacial exchange-biased thin film system", S. Ye, T. Nozaki, Y. Kotani, K. Toyoki, T. Nakamura, S. Yonemura, T. Shibata, S. Pati, M. Al-Mahdawi, Y. Shiokawa, and M. Sahashi, J. Mater. Chem. C 6, 2962-2969 (2018).
  • "Geometrical protection of topological magnetic solitons in microprocessed chiral magnets", M. Mito, H. Ohsumi, K. Tsuruta, Y. Kotani, T. Nakamura, Y. Togawa, M. Shinozaki, Y. Kato, J. Kishine, J. Ohe, Y. Kousaka, J. Akimitsu, and K. Inoue, Phys. Rev. B 97, 024408 (2018).
  • "Correlation of the Dzyaloshinskii-Moriya Interaction with Heisenberg Exchange and Orbital Asphericity", S. Kim, K. Ueda, G. Go, P.H. Jang, K.J. Lee, A. Belabbes, A. Manchon, M. Suzuki, Y. Kotani, T. Nakamura, K. Nakamura, T. Koyama, D. Chiba, K. Yamada, D.H. Kim, T. Moriyama, K.J. Kim and T. Ono, Nat. Commun. 9, 1648 (2018).
  • "Temperature dependence of the crystal structures and phase fractions of secondary phases in a Nd-Fe-B sintered magnet", N. Tsuji, H. Okazaki, W. Ueno, Y. Kotani, D. Billington, A. Yasui, S. Kawaguchi, K. Sugimoto, K. Toyoki, T. Fukagawa, T. Nishiuchi, Y. Gohda, S. Hirosawa, K. Hono, and T. Nakamura, Acta Mater. 154, 25-32 (2018).
  • "Electric field effect on magnetism in a MgO/Pd/Co system using a solid-state capacitor structure", A. Obinata, T. Hirai, Y. Kotani, K. Toyoki, T. Nakamura, T. Koyama and D. Chiba, AIP Advances 8, 115122 (2018)
  • "Realization of a scanning soft X-ray microscope for magnetic imaging under high magnetic fields", Y. Kotani, Y. Senba, K. Toyoki, D. Billington, H. Okazaki, A. Yasui, W. Ueno, H. Ohashi, S. Hirosawa, Y. Shiratsuchi, and T. Nakamura, J. Synchrotron Rad. 25, 1444-1449 (2018).
  • "Unmasking the interior magnetic domain structure and evolution in Nd-Fe-B sintered magnets through high-field magnetic imaging of the fractured surface", D. Billington, K. Toyoki, H. Okazaki, Y. Kotani, T. Fukagawa, T. Nishiuchi, S. Hirosawa, and T. Nakamura, Phys. Rev. Materials 2, 104413 (2018)

  • 2017

  • "Simultaneous achievement of high perpendicular exchange bias and low coercivity by controlling ferromagnetic/antiferromagnetic interfacial magnetic anisotropy", Y. Shiratsuchi, W. Kuroda, T.V.A. Nguyen, Y. Kotani, K. Toyoki, T. Nakamura, M. Suzuki, K. Nakamura, and R. Nakatani, J. Appl. Phys. 121, 073902 (2017).
  • "40 T Soft X-ray Spectroscopies on Magnetic-Field-Induced Valence Transition in Eu(Rh1-xIrx)2Si2 (x = 0.3)", H. Yasumura, Y. Narumi, T. Nakamura, Y Kotani, A. Yasui, E. Kishaba, A. Mitsuda, H. Wada, K. Kindo, and H. Nojiri, J. Phys. Soc. Jpn. 86, 054706 (2017)
  • "Voltage control of platinum orbits: a contribution to interfacial magnetism", S. Miwa, M. Suzuki, M. Tsujikawa, K. Matsuda, T. Nozaki, K. Tanaka, T. Tsukahara, K. Nawaoka, M. Goto, Y. Kotani, T. Ohkubo, F. Bonell, E. Tamura, K. Hono, T. Nakamura, M. Shirai, S. Yuasa, and Y.Suzuki, Nat Commun. 8, 15848 (2017).
  • "Contributions of Co and Fe orbitals to Perpendicular Magnetic Anisotropy of MgO/CoFeB Bilayers with Spin-Orbit-Torque-Related (Ta, W, IrMn, and Ti) Underlayers", S. Kim, S.C. Baek, M. Ishibashi, K. Yamada, T. Taniguchi, T. Okuno, Y. Kotani, T. Nakamura, K.J. Kim, T. Moriyama, B.G. Park, and T. Ono, Appl. Phys. Express 10, 073006 (2017).
  • "Characterization of the magnetic moments of ultrathin Fe film in an external electric field via high-precision X-ray magnetic circular dichroism spectroscopy", T. Tsukahara, T. Kawabe, K. Shimose, T. Furuta, R. Miyakaze, K.Nawaoka, M. Goto,, T. Nozaki, S. Yuasa, Y. Kotani, K. Toyoki, M. Suzuki, T. Nakamura, Y. Suzuki and S. Miwa, Jpn. J. Appl. Phys. Rapid Communications 56, 060304(2017).
  • "Electric-field-induced changes of magnetic moments and magnetocrystalline anisotropy in ultrathin cobalt films",T. Kawabe, K. Yoshikawa, M. Tsujikawa, T. Tsukahara, K. Nawaoka, Y. Kotani, K. Toyoki, M. Goto, M. Suzuki, T. Nakamura, M. Shirai, Y. Suzuki, and S. Miwa, Phys. Rev. B 96, 220412(R) (2017).

  • 2016

  • "Upgrade of BL25SU for Soft X-ray Imaging and Spectroscopy of Solid Using Nano- and Micro-focused Beams at SPring-8", Y.Senba, H. Ohashi, Y. Kotani, T. Nakamura, T. Muro, T. Ohkochi, N. Tsuji, H. Kishimoto, T. Miura, M. Tanaka, M. Higashiyama, S. Takahashi, Y. Ishizawa, T. Matsushita, Y. Furukawa, T. Ohata, N. Nariyama, K. Takeshita, T. Kinoshita, A. Fujiwara, M. Takata, and S. Goto, AIP Conference Proceedings 1741, 030044 (2016).
  • "Magnetic domain evolutionin Nd-Fe-B:Cu sintered magnet visualized by scanning hard X-ray microprobe", M.Suzuki, A. Yasui, Y. Kotani, N. Tsuji, T. Nakamura, and S. Hirosawa,Acta Materialia 106, 155-161 (2016).
  • "Ion Irradiation-Induced Magnetic Transition of MnGa Alloy Films Studied by X-Ray Magnetic Circular Dichroism and Low-Temperature Hysteresis Loops", D. Oshima, M. Tanimoto, T. Kato, Y. Fujiwara, T. Nakamura, Y. Kotani, and S. Iwata, IEEE Transactions on Magnetics 52, 3201804 (2016).
  • ビームライン高度化

    • 元素戦略に基づく材料開発のための軟X線ナノビームラインBL25SU基盤整備 SPring-8利用者情報誌, Vol.19, No.2, p.102-105 (2014).
    • BL25SU(軟X線固体分光ビームライン)の現状(2014), SPring-8/SACLA利用研究成果集

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