Magnetism and superconductivity in FeSe1-xTex superconducor studied by Fe and Te Mossbauer spectroscopy

• Project/Area Number: 24540371
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Kyoto University
• Principal Investigator: Kitao Shinji 京都大学, 原子炉実験所, 准教授 (00314295)
• Research Collaborator: KUROKUZU Masayuki 京都大学, 原子炉実験所, 非常勤研究員
• Project Period (FY): 2012-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2012: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 鉄系超伝導 / メスバウアー効果 / テルル / 磁気秩序 / 内部磁場 / 鉄系超伝導体 / メスバウアー分光 / 核共鳴散乱

Outline of Final Research Achievements

In this study, Fe- and Te- Mossbauer spectroscopies were applied to a Fe-based superconductor, FeTe1-xSex. One of the main results was that we have observed internal magnetic field not only for Fe but also for Te when it has the antiferromagnetic order. This fact implies that the magnetic order in Fe affects the electronic state of Te through hybridization between Fe and Te orbitals.

Research Products

• [Journal Article] 125Te Synchrotron-Radiation-Based Mössbauer Spectroscopy of Fe1.1Te and FeTe0.5Se0.5 (2014)
  • Author(s): Masayuki Kurokuzu, Shinji Kitao, Yasuhiro Kobayashi, Makina Saito, Ryo Masuda, Takaya Mitsui, Yoshitaka Yoda, Makoto Seto
  • Journal Title: Journal of the Physical Society of Japan Volume: 83 Issue: 4 Pages: 044708-044708
  • DOI: 10.7566/jpsj.83.044708
  • NAID: 210000133047
  • Peer Reviewed
• [Journal Article] 強磁場下メスバウアー分光による鉄系超伝導体母物質FeTeの磁性 (2014)
  • Author(s): 北尾真司、黒葛真行、増田亮、小林康浩、瀬戸誠
  • Journal Title: 京都大学原子炉実験所 第48回学術講演会報文集 Volume: KURRI-KR-193 Pages: 152-156
• [Presentation] Magnetism of Fe1.1Te Studied by 125Te- and 57Fe-Mossbauer Spectroscopy and 57Fe-Nuclear Resonant Forward Scattering (2015)
  • Author(s): S. Kitao, M. Kurokuzu, Y. Kobayashi, M. Saito, M. Seto, X.W. Zhang, and S. Kishimoto
  • Organizer: International Conference on the Application of the Mossbauer Effect
  • Place of Presentation: Hamburg, Germany
  • Year and Date: 2015-09-13
  • Int'l Joint Research
• [Presentation] 125Teおよび57Feメスバウアー分光と57Fe核共鳴前方散乱によるFe1.1Teの磁気秩序 (2015)
  • Author(s): 北尾真司，黒葛真行，小林康浩，増田亮，齋藤真器名，瀬戸誠，張小威，岸本俊二
  • Organizer: 日本物理学会第70回年次大会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2015-03-21 – 2015-03-24
• [Presentation] 強磁場下メスバウアー分光による鉄系超伝導体母物質の磁性 (2014)
  • Author(s): 北尾真司、黒葛真行、増田亮、小林康浩、瀬戸誠
  • Organizer: 京都大学原子炉実験所 第48回学術講演会
  • Place of Presentation: 京都大学原子炉実験所
• [Presentation] Ba1-xKxFe2As2のネマティック秩序相のメスバウアー効果 (2014)
  • Author(s): 北尾真司，黒葛真行，小林康浩，増田亮，瀬戸誠
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学湘南キャンパス
• [Presentation] Magnetism of FeTe Studied by Applied-Field 57Fe-Mossbauer Spectroscopy and Nuclear Resonant Forward Scattering (2013)
  • Author(s): S. Kitao, M. Kurokuzu, Y. Kobayashi, M. Saito, M. Seto, T. Mitsui, X. W. Zhang, and S. Kishimoto
  • Organizer: International Conference on the Applications of the Mossbauer Effect (ICAME2013)
  • Place of Presentation: Opatia, Croatia
• [Presentation] 磁場下メスバウアー分光および核共鳴前方散乱によるFeTeの磁性 (2013)
  • Author(s): 北尾真司，黒葛真行，小林康浩，齋藤真器名，瀬戸誠
  • Organizer: 日本物理学会 2013年秋季大会
  • Place of Presentation: 徳島大学
• [Presentation] 鉄系超伝導体母物質のネマティック秩序とメスバウアー分光 (2013)
  • Author(s): 北尾真司，黒葛真行，小林康浩，増田亮，三井隆也，瀬戸誠
  • Organizer: 日本物理学会 第68回年次大会
  • Place of Presentation: 広島大学