Controlling the functionality of thin films prepared on flexible, metal technical substrates

• Project/Area Number: 15K13336
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Nagoya University
• Principal Investigator: IIDA Kazumasa 名古屋大学, 工学研究科, 准教授 (90749384)
• Research Collaborator: Hühne Ruben Institute for Metallic Materials, Institute for Solid State and Materials Research Dresden ; Efremov Dimitry Institute for Metallic Materials, Institute for Solid State and Materials Research Dresden ; Drechsler Stefan-Ludwig Institute for Metallic Materials, Institute for Solid State and Materials Research Dresden ; Grinenko Vadim Technical University Dresden ; Holzapfel Bernhard Institute for Technical Physics, Karlsruhe Institte of Technology ; Hänisch Jens Institute for Technical Physics, Karlsruhe Institte of Technology
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
• Keywords: 動的歪み / 鉄系超伝導薄膜 / ピエゾ効果 / 電子相図 / 歪み / ピエゾ / 機能性制御 / 超伝導 / 金属基板

Outline of Final Research Achievements

Superconducting thin films were prepared on flexible metal substrates in order to induce a huge in-plane strain at cryogenic temperatures. For this purpose, we have fabricated a small device based on piezo electric materials. We demonstrated a successful tuning of the superconducting transition temperature of BaFe1.92Co0.08As2 thin films by compressive in-plain strain. Additionally, we have constructed the electronic phase diagrams of Ba(fe1-xCox)2As2 thin films on MgO and CaF2 single crystalline substrates. It was found that MgO substrate induces tensile in-plane strain whereas CaF2 substrate yields in-plane compressive strain. The resultant phase diagrams are observed to various shift in comparison of the single crystal, i.e., low Co region by tensile in-plane strain and high Co region by compressive in-plane strain, respectively.

Research Products

• [Int'l Joint Research] IFW Dresden/Karlsruhe Institute of Technology/Technical University Dresden(ドイツ)
• [Journal Article] Hall-plot of the phase diagram for Ba(Fe1-xCox)2As2 (2016)
  • Author(s): K. Iida, V. Grinenko, F. Kurth, A. Ichinose, I. Tsukada, E. Ahrens, A. Pulenas, P. Chekhonin, W. Skrotzki, A. Teresa, R. Huehne, S. Aswartham, S. Wurmehl, I. Moench, M. Erbe, J. Haenisch, B. Holzapfel, S-L. Drechsler, D.V. Efremov
  • Journal Title: Scientific Reports Volume: 6 Issue: 1
  • DOI: 10.1038/srep28390
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] Ca(Mn,Zn)2Bi2の磁気相図と磁気輸送特性 (2016)
  • Author(s): 川口直樹，浦田隆広，畑野敬史，飯田和昌，生田博志
  • Organizer: 日本物理学会2016年秋季大会
  • Place of Presentation: 金沢大学（石川県）
  • Year and Date: 2016-09-14
• [Presentation] 強磁場スパッタ法によるマンガン窒化物薄膜の作製 (2016)
  • Author(s): 松本利希
  • Organizer: 日本応用物理学会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2016-03-21
• [Presentation] Zn部分置換によるCaMn2Bi2単結晶の強磁性誘起とその物性 (2016)
  • Author(s): 川口直樹
  • Organizer: 日本応用物理学会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2016-03-20
• [Presentation] Large Split between Nematic and Magnetic Transition in Ba(Fe1-xCox)2As2 Strained Films (2015)
  • Author(s): Kazumasa Iida
  • Organizer: 28th International Symposium on Superconductivity
  • Place of Presentation: タワーホール舟堀
  • Year and Date: 2015-11-16
  • Int'l Joint Research / Invited