Magnetization-direction-dependent inverse spin Hall effect observed in IrMn/NiFe/Cu/YIG multilayer structure

• 来源期刊: 中国物理B（英文版）
• 关键词: spin current magnetic insulator inverse Hall effect
• 年，卷（期）: 2019,（3）
• 页码范围: 329-332
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/1674-1056/28/3/037202

摘要

The magnetization-direction-dependent inverse spin Hall effect (ISHE) has been observed in NiFe film during spin Seebeck measurement in IrMn/NiFe/Cu/yttrium iron garnet (YIG) multilayer structure,where the YIG and NiFe layers act as the spin injector and spin current detector,respectively.By using the NiFe/IrMn exchange bias structure,the magnetization direction of YIG (MYIG) can be rotated with respect to that of NiFe (MNiFe) with a small magnetic field,thus allowing us to observe the magnetization-direction-dependent inverse spin Hall effect voltage in NiFe layer.Compared with the situation that polarization direction of spin current (σs) is perpendicular to MNiFe,the spin Seebeck voltage is about 30％ larger than that when σs and MNiFe are parallel to each other.This phenomenon may originate from either or both of stronger interface or bulk scattering to spin current when σs and MNiFe are perpendicular to each other.Our work provides a way to control the voltage induced by ISHE in ferromagnets.