Ultrafast spin current generated by electron-magnon scattering in bulk of ferromagnets

被引：13

作者：

Shin, Im-Hyuk ^{[1
,2
]}

Min, Byoung-Chul ^{[1
]}

Ju, Byeong-Kwon ^{[2
]}

Choi, Gyung-Min ^{[3
]}

机构：

[1] Korea Inst Sci & Technol, Ctr Spintron, Seoul 02972, South Korea

[2] Korea Univ, Dispiay & Nanosyst Lab, Seoul 02841, South Korea

[3] Sungkyunkwan Univ, Dept Energy Sci, Suwon 16419, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2018年 / 57卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

TRANSFER TORQUE DRIVEN; GIANT MAGNETORESISTANCE; METALLIC MULTILAYERS; DEMAGNETIZATION; MAGNETIZATION; VALVES; INJECTION; DYNAMICS;

D O I：

10.7567/JJAP.57.090307

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ultrafast demagnetization of metallic ferromagnets can generate a spin current in metallic nonmagnets in a ferromagnet/nonmagnet structure. Two different mechanisms for this phenomenon have been suggested: spin-dependent transport of hot electrons and spin generation by electron-magnon scattering. In this work, we optically measure a transient spin accumulation on a nonmagnetic Cu layer driven by the ultrafast demagnetization of a ferromagnet (Fe, Co, and Ni). The modeling based on the spin generation by electron-magnon scattering in bulk ferromagnets (namely, bulk spin pumping) well explains the dynamics and magnitude of the measured spin accumulation on Cu. (c) 2018 The Japan Society of Applied Physics

引用

页数：5