Low power consuming magnetization reversal using electric field coupled spin injector

2014 Fiscal Year Final Research Report

• Project/Area Number: 25630153
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Keio University
• Principal Investigator: NOZAKI Yukio 慶應義塾大学, 理工学部, 准教授 (30304760)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 強磁性共鳴 / マイクロ波アシスト磁気記録 / スピン流 / スピントランスファートルク

Outline of Final Research Achievements

In order to realize a microwave-assisted magnetic recording in next generation perpendicular medium, we studied some essential technologies needed for developing an electric field coupled spin injector. First, we succeeded to measure a spin transfer torque due to a spin current precisely by using a lateral spin valve structure. Then, it was demonstrated that the magnetization reversal in patterned ferromagnetic thin films could be assisted by a spin current owing to a spin pumping. Furthermore, we examined a circuit design for an electric field coupled excitation of FMR by using a test device composed of interdigital transducers on a piezoelectric substrate.

Free Research Field

ナノスケール磁性体における非線形スピンダイナミクス