Ultrafast three-dimensional magnetization precession and magnetic anisotropy of a photoexcited thin film of iron

被引：35

作者：

Carpene, E. ^{[1
]}

Mancini, E. ^{[1
]}

Dazzi, D. ^{[1
]}

Dallera, C. ^{[1
]}

Puppin, E. ^{[2
]}

De Silvestri, S. ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Fis, CNR, INFM Ultras, I-20133 Milan, Italy

[2] Politecn Milan, Dipartimento Fis, CNISM, I-20133 Milan, Italy

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 06期

关键词：

DYNAMICS; FIELD;

D O I：

10.1103/PhysRevB.81.060415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the three-dimensional dynamics of the magnetization vector launched by an intense infrared pulse of femtosecond duration in a thin Fe film. We demonstrate how a single experiment of time-resolved magneto-optical Kerr effect can provide quantitative information on the temporal evolution of the magnetization trajectory. Our approach allows us to follow the precessional motion of the magnetization and to retrieve the modulus and orientation of the magnetocrystalline anisotropy field as a function of time-and therefore of the local temperature-providing a direct experimental evidence of the phenomenological mechanism triggering the magnetization precession.

引用

页数：4

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