Single laser pulse induced dynamic magnetization reversal mechanism of perpendicularly magnetized L10 FePt films

被引:16
|
作者
Liu, X. D. [1 ,2 ]
Xu, Z. [3 ]
Gao, R. X. [1 ,2 ]
Chen, Z. F. [1 ,2 ]
Lai, T. S. [1 ,2 ]
Du, J. [4 ]
Zhou, S. M. [3 ]
机构
[1] Zhongshan Sun Yat Sen Univ, Dept Phys, Guangzhou 510275, Guangdong, Peoples R China
[2] Zhongshan Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
[3] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[4] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
关键词
ferromagnetic materials; high-speed optical techniques; iron alloys; Kerr magneto-optical effect; magnetic domain walls; magnetic switching; magnetic thin films; magnetisation reversal; nucleation; photomagnetic effect; platinum alloys; ULTRAFAST; NICKEL;
D O I
10.1063/1.3208062
中图分类号
O59 [应用物理学];
学科分类号
摘要
In order to measure photoinduced dynamic magnetization reversal by single laser pulse, alternating magnetic field is synchronized with the femtosecond laser pulse such that the magnetization state is reset before each single laser pulse. For perpendicularly magnetized L1(0) FePt films, the dynamic magnetization reversal process is accompanied by the nucleation of reversed domains and the barrierless transient domain wall motion at low magnetic fields and subsequent pinned domain wall motion at the switching field. The switching field does not change with the pump-probe delay time.
引用
收藏
页数:4
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