Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo

[en] Using the time-resolved magneto-optical Kerr effect method, helicity-dependent all-optical magnetization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. Our results reveal the individual roles of the thermal and nonthermal effects after a single circularly polarized laser pulse. The evolution of this ultrafast switching occurs over different time scales, and a defined magnetization reversal time of 460 fs is shown—the fastest ever observed. Micromagnetic simulations based on a single macro-spin model, taking into account both heating and the inverse Faraday effect, are performed which reproduce HD-AOS demonstrating a linear path for magnetization reversal. Published

Disciplines :

Physics

Author, co-author :

Lu, X

Zou, X

Hinzke, D

Liu, T

Wang, Y

Cheng, T

Wu, J

Ostler, Thomas ; Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures

Cai, J

Nowak, U

More authors (3 more)

Language :

English

Title :

Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo

Publication date :

18 July 2018

Journal title :

Applied Physics Letters

ISSN :

0003-6951

eISSN :

1077-3118

Publisher :

American Institute of Physics, United States - New York

Volume :

113

Pages :

032405

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

National Basic Research Program of China
National Key Research and Development Program of China
NSCF - National Natural Science Foundation of China
Jiangsu Shuangchuang Programme
Natural Science Foundation of Jiangsu Province of China
BeIPD-COFUND Fellowship Program at the University of Liège

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since 02 August 2018

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