Spin dynamics of epitaxial ferromagnetic metal film on insulating layer

2015 Fiscal Year Final Research Report

• Project/Area Number: 26630296
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Physical properties of metals/Metal-base materials
• Research Institution: Osaka University
• Principal Investigator: Shiratsuchi Yu 大阪大学, 工学(系)研究科(研究院), 准教授 (70379121)
• Co-Investigator(Kenkyū-buntansha): ENDO Yasushi 東北大学, 大学院工学研究科, 准教授 (50335379)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: スピンダイナミクス / 強磁性共鳴 / Cr2O3 / 電気磁気効果 / 反強磁性スピン

Outline of Final Research Achievements

Toward the clarification of spin-dynamics of ferromagnetic/insulating antiferromagnetic stacked system, we investiagted (1) antiferromagentic spin dynamics under tha pulsed voltage and (2) ferromagnetic resonance measurement based on CPW-FMR method for the Co/Pt film/multilayer grown on magnetoelectric Cr2O3 layer.
Former experiments clarified that the antiferromagnetic spin revsersal time is in the order of a few hundred nano-seconds under the condition of -10 kOe and -1750 kV/cm. Latter invesitgation indicated that the ferromagnetic resonance frequency of Co/Pt multilayer on Cr2O3 is in GHz range. These results implyes that the antiferromagnetic spin reversal process is dominated by the magnetic domain wall propagation.

Free Research Field

スピントロニクス、ナノ材料、ナノ磁性