Development of hydrogen controllabel GMR multilayer

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K04745
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26040:Structural materials and functional materials-related
• Research Institution: University of Toyama
• Principal Investigator: Akamaru Satoshi 富山大学, 学術研究部理学系, 助教 (10420324)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: パラジウム合金 / 磁性多層膜 / 巨大磁気抵抗効果 / 水素吸蔵合金

Outline of Final Research Achievements

PdCo/Cu magnetic multilayer was constructed and its magnetoresistance under nitrogen and hydrogen gas mixture were measured. The multilayer showed giant magnetoresistance (GMR) effect after adjusting Co concentration and structure in PdCo. The GMR effect was reduced under the nitrogen and hydrogen gas mixture, because the absorbed hydrogen in PdCo reduced its magnetization. The GMR effect could be adjusted by changing the hydrogen concentration in gas mixture.

Free Research Field

機能性材料学

Academic Significance and Societal Importance of the Research Achievements

巨大磁気抵抗効果を外部因子により制御できることは、大きな抵抗変化を水素センサに利用できる可能性がある。また巨大磁気抵抗効果が応用されている産業においても、素子の改良・改善につながる可能性がある。また、水素吸蔵合金の電子物性分野への応用といった視点から、今後学術的に新たな展開が広がることが期待される。