Ultrafast time resolved photoinduced magnetization rotation in a ferromagnetic/antiferromagnetic exchange coupled system

被引：146

作者：

Ju, GP ^{[1
]}

Nurmikko, AV

Farrow, RFC

Marks, RF

Carey, MJ

Gurney, BA

机构：

[1] Brown Univ, Dept Phys, Providence, RI 02912 USA

[2] Brown Univ, Div Engn, Providence, RI 02912 USA

[3] IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.82.3705

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrashort pulse laser techniques are applied to study optically induced modulation in exchange biased ferromagnetic/antiferromagnetic (FM/AF) thin bilayer films (NiFe/NiO). Photoexcitation of the FM/AF interface with subpicosecond laser pulses induces large modulation in the unidirectional exchange bias field (H-ex) on an ultrashort time scale. The "unpinning" of the exchange bias leads to coherent magnetization rotation in the permalloy film which is time resolved by the experiment and corresponds to a large modulation in the magnetization component (Delta M-Z/M-S similar to 0.5), on a time scale of 100 psec. [S0031-9007(99)09042-0].

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收藏

页码：3705 / 3708

页数：4

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