Electric field induced magnon interference

Research Project

Project/Area Number	26600078
Research Category	Grant-in-Aid for Challenging Exploratory Research
Allocation Type	Multi-year Fund
Research Field	Applied materials
Research Institution	Keio University
Principal Investigator	ANDO KAZUYA 慶應義塾大学, 理工学部, 准教授 (30579610)
Project Period (FY)	2014-04-01 – 2016-03-31
Project Status	Completed (Fiscal Year 2015)
Budget Amount *help	¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000) Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000) Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords	スピントロニクス
Outline of Final Research Achievements	Magnons are responsible for the angular momentum transport in magnetic insulators. The angular momentum of magnons can be transferred to conduction electrons at metal/magnetic insulator interfaces, which is the foundation of insulator-based spintronics. In this study, we revealed disappearance of the angular momentum conversion between magnons and conduction electron spins by measuring spin-current emission from a magnetic insulator. We also found that magnon splitting also creates the magnon mode that is disconnected to the conduction electron spin currents at metal/magnetic insulator interfaces.