Spin Pumping in Polycrystalline Magnetic Insulator/Metal Pt Films

Author

Kajiwara, Yugo ; Ando, K. ; Nakayama, Hiroki ; Takahashi, Ryo ; Saitoh, E.

Author_Institution

Inst. for Mater. Res., Tohoku Univ., Sendai, Japan

Volume

47

Issue

10

fYear

2011

Firstpage

2739

Lastpage

2742

Abstract

In this paper, we demonstrate the spin pumping, spin current generation from magnetization dynamics, at an interface between metal Pt and polycrystalline magnetic insulator Bi_xY_3-xFe₅O₁₂ (x=0 and 1) prepared by the metal-organic decomposition method. We measured the electromotive force due to the inverse spin-Hall effect induced by the spin pumping in a polycrystalline Y₃Fe₅O₁₂/Pt and a polycrystalline BiY₂Fe₅O₁₂/Pt films. We found that spin mixing conductance estimated from the magnitude of the electromotive force for the BiY₂Fe₅O₁₂/Pt is much greater than that for the Y₃Fe₅O₁₂/Pt.

Keywords

bismuth compounds; electric potential; insulating thin films; interface magnetism; magnetisation; metal-insulator boundaries; metallic thin films; platinum; spin Hall effect; yttrium compounds; BiY₂Fe₅O₁₂-Pt; Y₃Fe₅O₁₂-Pt; electromotive force; inverse spin Hall effect; magnetization dynamics; metal films; metal-organic decomposition method; polycrystalline magnetic insulator; spin current generation; spin mixing conductance; spin pumping; Force; Insulators; Magnetic multilayers; Magnetic resonance; Magnetization; Metals; Microwave measurements; Inverse spin-Hall effect; spin current; spin pumping; spintronics;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2150737

Filename

6027596