Elucidation of coexistence between superconductivity and magnetic order using rutheno-cuprate magnetic superconductor single crystal

• Project/Area Number: 18K04921
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 29010:Applied physical properties-related
• Research Institution: Utsunomiya University
• Principal Investigator: YAMAKI KAZUHIRO 宇都宮大学, 工学部, 准教授 (90579757)
• Project Period (FY): 2018-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 銅酸化物高温超伝導体 / 単結晶 / 構造解析 / 部分溶融 / 磁性超伝導体 / ルテニウム化合物 / 超伝導 / ルテニウム系銅酸化物 / 固有ジョセフソン接合 / 分解溶融型化合物

Outline of Final Research Achievements

We have succeeded in establishing a method for synthesizing rutheno-cuprates single crystals with a size of 100 micrometres in length. The structural analysis of the single-crystal samples revealed that superconductivity is inhibited by two factors: (1) Ru substitutions on the superconducting CuO2 planes and (2) rare earth substitutions on the Sr sites in the blocking layer. Furthermore, we succeeded in synthesizing a single crystal of the RuRE-1222 system with two rare earth layers inserted between the superconducting planes.

Academic Significance and Societal Importance of the Research Achievements

本研究課題により，分解溶融型の複合酸化物でルテニウム元素の昇華性もあり極めて合成の難しいルテニウム系銅酸化物の微小単結晶試料の合成手法を確立することに成功しました．この成果は他の蒸気圧の高い材料や分解溶融型物質の単結晶成長に関して新たな合成経路を提供するもので，多くの類型化合物への展開が期待できます．更に単結晶試料を用いた精密物性測定によってルテニウム系銅酸化物の超伝導機構の解明が進みました．

Research Products

• [Journal Article] Preparation of RuEu-1212 and RuEu-1222 Large Single-Crystalline Grains by Partial Melting (2021)
  • Author(s): Yamaki K.、Kitagawa N.、Mochiku T.、Matsuhita Y.、Funahashi S.、Irie A.
  • Journal Title: Journal of Superconductivity and Novel Magnetism Volume: 34 Issue: 8 Pages: 2207-2215
  • DOI: 10.1007/s10948-021-05987-8
  • Peer Reviewed
• [Journal Article] Preparation of superconducting RuGd-1222 single crystals by partial melting (2021)
  • Author(s): Yamaki Kazuhiro、Mochiku Takashi、Tezuka Keitaro、Irie Akinobu
  • Journal Title: Physica C: Superconductivity and its Applications Volume: 580 Pages: 1353798-1353798
  • DOI: 10.1016/j.physc.2020.1353798
  • Peer Reviewed
• [Journal Article] Bulk superconductivity in RuGd-1212 single crystals (2020)
  • Author(s): Funahashi Shugo、Mochiku Takashi、Matsushita Yoshitaka、Bamba Yoshihiro、Tezuka Keitaro、Kitamura Michihide、Yamaki Kazuhiro、Irie Akinobu
  • Journal Title: Japanese Journal of Applied Physics Volume: 59 Issue: 7 Pages: 073002-073002
  • DOI: 10.35848/1347-4065/ab9848
  • Peer Reviewed
• [Journal Article] Preparation of Fine Single Crystals of Rutheno-Cuprates by the Self-Flux Method with Alumina Boats (2019)
  • Author(s): Yamaki K.、Bamba Y.、Irie A.
  • Journal Title: Journal of Superconductivity and Novel Magnetism Volume: 32 Issue: 5 Pages: 1171-1177
  • DOI: 10.1007/s10948-018-4803-8
  • Peer Reviewed
• [Journal Article] Synthesis and structure of rutheno-cuprate (RE, Ce)2Sr2RuCu2O10-δ (RE=Gd, Eu) single crystals (2019)
  • Author(s): Yamaki Kazuhiro、Mochiku Takashi、Matsushita Yoshitaka、Kitamura Michihide、Irie Akinobu
  • Journal Title: Physica C: Superconductivity and its Applications Volume: 562 Pages: 25-31
  • DOI: 10.1016/j.physc.2019.03.007
  • Peer Reviewed
• [Journal Article] Synthesis and structural characterization of a superconducting GdSr2RuCu2O8-δ single crystal grown by partial melting (2018)
  • Author(s): Yamaki Kazuhiro、Mochiku Takashi、Funahashi Shugo、Bamba Yoshihiro、Kitamura Michihide、Matsushita Yoshitaka、Irie Akinobu
  • Journal Title: Applied Physics Express Volume: 11 Issue: 11 Pages: 113101-113101
  • DOI: 10.7567/apex.11.113101
  • NAID: 210000136403
  • Peer Reviewed / Open Access
• [Journal Article] Preparation and characterization of the magnetic superconductor EuSr2RuCu2O8-δ (RuEu-1212) by partial melting (2018)
  • Author(s): Yamaki K.、Kitagawa N.、Funahashi S.、Bamba Y.、Irie A.
  • Journal Title: Physica C: Superconductivity and its Applications Volume: 550 Pages: 95-98
  • DOI: 10.1016/j.physc.2018.04.017
  • Peer Reviewed
• [Presentation] 部分溶融とFZ法によるEuSr2Cu2NbO8-d単結晶の育成 (2021)
  • Author(s): 八巻和宏，谷勝也，入江晃亘
  • Organizer: 2021年第82回応用物理学会秋季学術講演会
• [Presentation] Synthesis and characterization of RuEu-1212 and RuEu-1222 single crystals (2020)
  • Author(s): K. Yamaki, N. Kitagawa, T. Mochiku, Y. Matsushita, S. Funahashi, A. Irie
  • Organizer: ASC 2020 Virtual conference
  • Int'l Joint Research
• [Presentation] ルテニウム系銅酸化物RuRE-1212系単結晶における希土類サイトへのDy, Tb部分置換 (2020)
  • Author(s): 北川尚樹，八巻和宏，茂筑高士，入江晃亘
  • Organizer: 2020年第81回応用物理学会秋季学術講演会
• [Presentation] 部分溶融法におけるルテニウム系銅酸化物RuEu-1222単結晶の合成温度と超伝導転移温度の関係 (2020)
  • Author(s): 五十嵐恭佑，北川尚樹，八巻和宏，入江晃亘
  • Organizer: 2020年第81回応用物理学会秋季学術講演会
• [Presentation] 層状ルテニウム系銅酸化物超伝導体の単結晶合成の現状 (2020)
  • Author(s): 〇八巻和宏、茂筑高士、松下能孝、北村通英、入江晃亘
  • Organizer: 第67回応用物理学会春季学術講演会
• [Presentation] 部分溶融によるRuGd-1212単結晶の合成と超伝導特性の向上 (2019)
  • Author(s): 船橋周悟、番場幸大、茂筑高士、松下能孝、手塚慶太郎、北村通英、〇八巻和宏、入江晃亘
  • Organizer: 2019年第80回応用物理学会秋季学術講演会
• [Presentation] Synthesis and structural characterization of rutheno-cuprate single crystals (2019)
  • Author(s): ○K. Yamaki, S. Funahashi, Y. Bamba, K. Tezuka, M. Kitamura, A. Irie, T. Mochiku, Y. Matsushita
  • Organizer: The 3rd KU-VUW joint workshop 2019
  • Int'l Joint Research / Invited
• [Presentation] 層状ルテニウム系銅酸化物の単結晶合成 (2019)
  • Author(s): 〇八巻和宏，船橋周悟，番場幸大，北村通英，入江晃亘，茂筑高士，松下能孝
  • Organizer: 第27回渦糸物理ワークショップ
• [Presentation] 部分溶融によるルテニウム系銅酸化物RuGd-1222単結晶の合成 (2019)
  • Author(s): 〇八巻 和宏、入江 晃亘
  • Organizer: 2019年第80回応用物理学会秋季学術講演会
• [Presentation] 磁性超伝導体RuGd-1212単結晶の超伝導性に関する検討 (2019)
  • Author(s): 船橋 周悟、八巻 和宏、茂筑 高士、松下 能孝、入江 晃亘
  • Organizer: 2019年 第66回応用物理学会春季学術講演会
• [Presentation] RuEu-1212の単結晶育成とその特性評価 (2019)
  • Author(s): 北川 尚樹、船橋 周悟、八巻 和宏、入江 晃亘
  • Organizer: 2019年 第66回応用物理学会春季学術講演会
• [Presentation] RuEu-1222単結晶の合成とRuGd-1222の単結晶構造解析 (2018)
  • Author(s): 八巻 和宏、茂筑 高士、松下 能孝、入江 晃亘
  • Organizer: 2018年 第79回応用物理学会秋季学術講演会
• [Remarks] researchmap
  • URL: https://researchmap.jp/rutheno-cuprate23