Helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers

被引：26

作者：

Tsema, Yu. ^{[1
]}

Kichin, G. ^{[1
]}

Hellwig, O. ^{[2
,3
,4
]}

Mehta, V. ^{[2
]}

Kimel, A. V. ^{[1
]}

Kirilyuk, A. ^{[1
]}

Rasing, Th. ^{[1
]}

机构：

[1] Radboud Univ Nijmegen, Inst Mol & Mat, Heyendaalseweg 135, NL-6525 AJ Nijmegen, Netherlands

[2] HGST, San Jose, CA 95135 USA

[3] Tech Univ Chemnitz, Inst Phys, D-09107 Chemnitz, Germany

[4] Helmholtz Zentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01328 Dresden, Germany

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 07期

基金：

欧洲研究理事会;

关键词：

ANISOTROPY; REVERSAL; DEMAGNETIZATION;

D O I：

10.1063/1.4961246

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present helicity and field dependent magnetization dynamics of ferromagnetic Co/Pt multilayers, suitable for all-optical helicity-dependent switching. Employing single-shot time-resolved magnetooptical Kerr effect imaging, our study demonstrates an ultra-fast quenching of the magnetization after a single 60 fs laser pulse excitation followed by a recovery. Full demagnetization occurs within 1 ps after laser excitation. The magnetization dynamics reveals a small helicity dependence caused by magnetic circular dichroism. When an external magnetic field is applied, a heat-assisted magnetization reversal occurs on a nanosecond time scale. (C) 2016 Author(s).

引用

页数：4

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