Development of practical space-efficient high-pressure apparatus and its application for NMR studies of strongly-correlated-electron systems

2011 Fiscal Year Final Research Report

• Project/Area Number: 22840014
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Condensed matter physics II
• Research Institution: The University of Tokyo
• Principal Investigator: KITAGAWA Kentaro 東京大学, 物性研究所, 特任研究員 (90567661)
• Project Period (FY): 2010 – 2011
• Keywords: 超高圧環境 / 対向アンビル型圧力装置 / 高圧NMR / 鉄系高温超伝導体 / 高圧核磁気共鳴

Research Abstract

We have developed new ultrahigh-pressure NMR technique to reach 10 GPa and over. This time we improved wiring method for our high-pressure cell, which features very large sample. The new method enables us to handle many electrodes and optical fiber beyond 10 GPa for the first time. Also we have performed single-crystal growth of iron-based superconductors, and reported detailed magnetic structures of the parent compound, and magnetism/superconducting coexisting state induced by a chemical pressure.

Research Products

• [Journal Article] Microwave surface impedancemeasurements of LiFeAs, LiFe(As, P) and FeSe1-xTex single crystals (2011)
  • Author(s): Y. Imai, H. Takahashi, T. Okada, T. Yoshinaka, S. Komiya, K. Kitagawa, K. Matsubayashi, I. Tsukada, Y. Uwatoko, and A. Maeda
  • Journal Title: Physica C誌 Volume: 471巻 Pages: 630-633
  • Peer Reviewed
• [Journal Article] Crossover from commensurate to incommensurate antiferromagnetism in stoichiometric NaFeAs revealed by single-crystal^<23> Na,^<75> As-NMR experiments (2011)
  • Author(s): Kentaro Kitagawa, Yuji Mezaki, Kazuyuki Matsubayashi, Yoshiya Uwatoko, and Masashi Takigawa
  • Journal Title: Journal of the Physical Society of Japan誌 Volume: 80巻 Pages: 033705-1-4
  • DOI: DOI:10.1143/JPSJ.80.033705
  • Peer Reviewed
• [Journal Article] Determination of the Upper Critical Field of a Single Crystal LiFeAs : The Magnetic Torque Study up to 35 Tesla. (2011)
  • Author(s): Nobuyuki Kurita, Kentaro Kitagawa, Kazuyuki Matsubayashi, Ade Kismarahardja, Eun-Sang Choi, James S. Brooks, Yoshiya Uwatoko, Shinya Uji, and Taichi Terashima
  • Journal Title: Journal of the Physical Society of Japan誌 Volume: 80巻 Pages: 013706-1-4
  • DOI: DOI:10.1143/JPSJ.80.013706
  • Peer Reviewed
• [Journal Article] Microwave Surface Impedance Measurements of LiFeAs Single Crystals. (2011)
  • Author(s): Yoshinori Imai, Hideyuki Takahashi, Kentaro Kitagawa, Kazuyuki Matsubayashi, Noriyuki Nakai, Yuki Nagai, Yoshiya Uwatoko, Masahiko Machida, Atsutaka Maeda
  • Journal Title: Journal of the Physical Society of Japan誌 Volume: 80巻 Pages: 013704-1-4
  • DOI: DOI:10.1143/JPSJ.80.013704
  • Peer Reviewed
• [Journal Article] 超高圧環境下でのNMR-9万気圧級高体積効率高圧セルの開発- (2010)
  • Author(s): 北川健太郎、瀧川仁
  • Journal Title: 固体物理 Volume: 45巻 Pages: 307-318頁
  • URL: http://www.agne.co.jp/kotaibutsuri/kota1045.htm#no532
• [Presentation] 「鉄系超伝導体の微視的研究と超高圧下NMR測定法の開発」(領域8若手奨励賞受賞講演) (2012)
  • Author(s): 北川健太郎
  • Organizer: 日本物理学会
  • Place of Presentation: 関西大学(兵庫県)
  • Year and Date: 2012-03-25
• [Presentation] PドープSrFe2As2における反強磁性共存超伝導状態のNMR (2012)
  • Author(s): 北川健太郎、松林和幸、上床美也、瀧川仁
  • Organizer: 日本物理学会
  • Place of Presentation: 関西大学(兵庫県)
  • Year and Date: 2012-03-25
• [Presentation] 10GPa級対向アンビル型装置でのNMR技術の開発と鉄系超伝導への適用 (2011)
  • Author(s): 北川健太郎、後藤弘匡、片山尚幸、八木健彦、大串研也、松本健彦、上床美也、瀧川仁
  • Organizer: 高圧討論会
  • Place of Presentation: 沖縄キリスト教学院(沖縄県)
  • Year and Date: 2011-11-10
• [Presentation] 「NMRで見た鉄系の遍歴反強磁性と超伝導」(領域3・8シンポジウム「遍歴磁性と超伝導-両者の統合的な理解に向けて」) (2011)
  • Author(s): 北川健太郎
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2011-09-23
• [Presentation] PドープSrFe2As2の化学圧力誘起超伝導のNMR (2011)
  • Author(s): 北川健太郎、松林和幸、上床美也、瀧川仁
  • Organizer: 日本物理学会
  • Place of Presentation: 富山大学(富山県)
  • Year and Date: 2011-09-22
• [Presentation] 10GPa級対向アンビルセルを用いた固体NMR実験 (2010)
  • Author(s): 北川健太郎、後藤弘匡、八木健彦、松本武彦、上床美也、瀧川仁
  • Organizer: 高圧討論会
  • Place of Presentation: 仙台市戦災復興記念館(宮城県)
  • Year and Date: 2010-10-22
• [Presentation] 化学量論比NaFeAs単結晶の超高圧NMR実験 (2010)
  • Author(s): 北川健太郎、目崎雄二、松林和幸、上床美也、瀧川仁
  • Organizer: 日本物理学会
  • Place of Presentation: 大阪府立大学(大阪府)
  • Year and Date: 2010-09-24
• [Presentation] NMR experiment on clean iron-pnictide superconductors up to 8 GPa. (2010)
  • Author(s): Kentaro Kitagawa, Kazuyuki Matsubayashi, YujiMezaki, Naoyuki Katayama, Kenya Ohgushi, Hirotada Gotou, Takehiko Yagi, Takehiko Matsumoto, Yoshiya Uwatoko, and Masashi Takigawa
  • Organizer: International Conference on Core Research and Engineering Science of Advanced Materials
  • Place of Presentation: Osaka University(大阪府)
  • Year and Date: 2010-06-02
• [Remarks]
  • URL: http://www.cc.kochi-u.ac.jp/~kitag/