Subpicosecond magnetization reversal across ferrimagnetic compensation points

被引：178

作者：

Stanciu, C. D.

Tsukamoto, A.

Kimel, A. V.

Hansteen, F.

Kirilyuk, A.

Itoh, A.

Rasing, Th.

机构：

[1] Radboud Univ Nijmegen, Inst Mol & Mat, NL-6525 ED Nijmegen, Netherlands

[2] Nihon Univ, Coll Sci & Technol, Chiba, Japan

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.99.217204

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Subpicosecond magnetization reversal is experimentally demonstrated by ultrafast heating of a ferrimagnet across its compensation points, under an applied magnetic field. While the reversal is initiated by crossing the magnetization compensation temperature, the short reversal time is related to the angular momentum compensation, where the dynamics of the system is highly accelerated owing to the divergence of the gyromagnetic ratio. These results demonstrate the feasibility of subpicosecond magnetization reversal previously believed impossible.

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页数：4

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