Origin of ferromagnetism at heterointerfaces with charge transfer studied by depth profiling methods using synchrotron-radiation spectroscopy

• Project/Area Number: 16H07442
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Kitamura Miho 大学共同利用機関法人高エネルギー加速器研究機構, 物質構造科学研究所, 博士研究員 (00783581)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 界面磁性 / 酸化物 / 表面・界面 / X線吸収分光 / X線磁気二色性 / 放射光 / 光電子分光 / 強相関電子系 / 磁性 / 放射線、X線、粒子線 / 表面・界面物性 / ペロブスカイト型酸化物 / 放射線、Ｘ 線、粒子線

Outline of Final Research Achievements

To investigate the relationship between the charge distribution and　ferromagnetism at the heterointerface between perovskite transition metal oxides, we have evaluated magnetic depth profiles using x-ray magnetic circular dichroism measurements of various heterostructures with different stack-order and thicknesses. We have found that not only the occurrence of the charge transfer but also the charge spreading are the keys to emergence of the novel ferromagnetism at heterointerfaces.

Research Products

• [Journal Article] Anisotropic spin-density distribution and magnetic anisotropy of strained La1-xSrxMnO3 thin films: Angle-dependent x-ray magnetic circular dichroism (2018)
  • Author(s): G. Shibata, M. Kitamura, M. Minohara, K. Yoshimatsu, T. Kadono, K. Ishigami, T. Harano, Y. Takahashi, S. Sakamoto, Y. Nonaka, K. Ikeda, Z. Chi, M. Furuse, S. Fuchino, M. Okano, J. Fujihira, A. Uchida, K. Watanabe, H. Fujihira, S. Fujihira, A. Tanaka, H. Kumigashira, T. Koide, and A. Fujimori
  • Journal Title: npj Quantum Materials Volume: VOL. 3 Issue: 1 Pages: 3-3
  • DOI: 10.1038/s41535-018-0077-4
  • Peer Reviewed / Open Access
• [Journal Article] Semimetallic bands derived from interlayer electrons in the quasi-two-dimensional electride Y2C (2017)
  • Author(s): Horiba Koji、Yukawa Ryu、Mitsuhashi Taichi、Kitamura Miho、Inoshita Takeshi、Hamada Noriaki、Otani Shigeki、Ohashi Naoki、Maki Sachiko、Yamaura Jun-ichi、Hosono Hideo、Murakami Youichi、Kumigashira Hiroshi
  • Journal Title: Physical Review B Volume: 96 Issue: 4 Pages: 045101-045101
  • DOI: 10.1103/physrevb.96.045101
  • Peer Reviewed
• [Journal Article] Emergence of Quantum Critical Behavior in Metallic Quantum-Well States of Strongly Correlated Oxides (2017)
  • Author(s): Kobayashi Masaki、Yoshimatsu Kohei、Mitsuhashi Taichi、Kitamura Miho、Sakai Enju、Yukawa Ryu、Minohara Makoto、Fujimori Atsushi、Horiba Koji、Kumigashira Hiroshi
  • Journal Title: Scientific Reports Volume: 7 Issue: 1 Pages: 16621-16621
  • DOI: 10.1038/s41598-017-16666-x
  • Peer Reviewed / Open Access
• [Journal Article] Hubbard band or oxygen vacancy states in the correlated electron metal SrVO3? (2016)
  • Author(s): S. Backes, T. C. Rodel, F. Fortuna, E. Frantzeskakis, P. Le Fevre, F. Bertran, M. Kobayashi, R. Yukawa, T. Mitsuhashi, M. Kitamura, K. Horiba, H. Kumigashira, R. Saint-Martin, A. Fouchet, B. Berini, Y. Dumont, A. J. Kim, F. Lechermann, H. O. Jeschke, M. J. Rozenberg, R. Valenti, and A. F. Santander-Syro
  • Journal Title: Phys. Rev. B. Volume: 94 Issue: 24 Pages: 241110-241110
  • DOI: 10.1103/physrevb.94.241110
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 遷移金属酸化物の電荷移動界面に発現する強磁性の起源 (2017)
  • Author(s): 北村未歩
  • Organizer: 第64回応用物理学会春季学術講演会
  • Invited
• [Presentation] Origin of interfacial ferromagnetism between perovskite oxides LaNiO3 and LaMnO3 (2017)
  • Author(s): M. Kitamura, K. Horiba, M. Kobayashi, E. Sakai, M. Minohara, R. Yukawa, T. Mitsuhashi, D. Shiga, K. Amemiya, T. Nagai, Y. Nonaka, G. Shibata, A. Fujimori, H. Fujioka, and H. Kumigashira
  • Organizer: IUMRS-ICAM 2017
  • Int'l Joint Research / Invited
• [Presentation] Charge distribution and ferromagnetism at the oxide heterointerface between perovskite oxides LaNiO3 and LaMnO3 (2017)
  • Author(s): M. Kitamura, K. Horiba, M. Kobayashi, E. Sakai, M. Minohara, R. Yukawa, T. Mitsuhashi, D. Shiga, K. Amemiya, T. Nagai, Y. Nonaka, G. Shibata, A. Fujimori, H. Fujioka, and H. Kumigashira
  • Organizer: JSAP Autumn meeting 2017
  • Int'l Joint Research / Invited
• [Presentation] ペロブスカイト遷移金属酸化物LaNiO3/LaMnO3ヘテロ界面における強磁性の起源 (2017)
  • Author(s): 北村未歩、堀場弘司、小林正起、坂井延寿、簔原誠人、湯川龍、志賀大亮、雨宮健太、野中洋亮、芝田悟朗、藤森淳、藤岡洋、組頭広志
  • Organizer: 2017年度量子ビームサイエンスフェスタ
• [Presentation] ペロブスカイト型遷移金属酸化物へテロ界面における電荷移動のメカニズム (2017)
  • Author(s): 北村未歩、小林正起、簔原誠人、坂井延寿、藤岡洋、堀場弘司、組頭広志
  • Organizer: 第65回応用物理学会春季学術講演会
• [Presentation] ペロブスカイト酸化物LaNiO3/LaMnO3へテロ界面における界面強磁性の起源解明 (2016)
  • Author(s): 北村未歩、堀場弘司、小林正起、坂井延寿、簔原誠人、湯川龍、三橋太一、雨宮健太、野中洋亮、芝田悟朗、藤森淳、藤岡洋、組頭広志
  • Organizer: 第30回日本放射光学会年会・放射光科学合同シンポジウム