Ultrafast magnetization reversal dynamics investigated by time domain imaging

被引：133

作者：

Choi, BC ^{[1
]}

Belov, M ^{[1
]}

Hiebert, WK ^{[1
]}

Ballentine, GE ^{[1
]}

Freeman, MR ^{[1
]}

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.86.728

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spatiotemporal magnetization reversal dynamics in a Ni80Fe20 microstructure is studied using ps time scale scanning Kerr microscopy. Time domain images reveal a striking change in the reversal associated with the reduction in switching time when a transverse bias field is applied. Magnetization oscillations subsequent to reversal are observed at two resonance frequencies, which sensitively depend on the bias field strength. The oscillation at f = 2 GHz is caused by the damped precession of M, while the lower frequency similar to0.8 GHz mode is interpreted in terms of domain wall oscillation. DOI: 10.1103/PhysRevLett.86.728.

引用

页码：728 / 731

页数：4

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