New development of ordered-alloy materials for spintronics

2017 Fiscal Year Final Research Report

• Project/Area Number: 25220910
• Research Category: Grant-in-Aid for Scientific Research (S)
• Allocation Type: Single-year Grants
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Tohoku University
• Principal Investigator: TAKANASHI Koki 東北大学, 金属材料研究所, 教授 (00187981)
• Co-Investigator(Kenkyū-buntansha): Bauer Gerrit 東北大学, 金属材料研究所, 教授 (10620213) ; 白井 正文 東北大学, 電気通信研究所, 教授 (70221306)
• Co-Investigator(Renkei-kenkyūsha): MIZUGUCHI Masaki 東北大学, 金属材料研究所, 准教授 (50397759) ; SAKURABA Yuya 東北大学, 金属材料研究所, 助教 (10451618) ; SEKI Takeshi 東北大学, 金属材料研究所, 准教授 (40579611) ; KUBOTA Takahide 東北大学, 金属材料研究所, 助教 (00580341)
• Project Period (FY): 2013-05-31 – 2018-03-31
• Keywords: 磁性材料 / スピントロニクス / ホイスラー合金 / 高磁気異方性 / スピンカロリトロニクス

Outline of Final Research Achievements

The purpose of this research project was the development of ordered alloys for high performance and multi-functional spintronics devices and their application to spincaloritronics. We successfully improved the giant magnetoresistance (GMR) effect for the device with L21-ordered Co2(FeMn)Si full-Heusler alloy, and observed room temperature GMR using C1b-ordered NiMnSb half-Heusler alloy. We also achieved high magnetic anisotropy and low magnetic damping simultaneously for L11-type-stacked CoNi. In addition, we revealed the material dependence of anomalous Nernst effect, leading to the guiding principle for high spincaloritronic functionality.

Free Research Field

磁性材料学