Femtosecond electron and spin dynamics in Ni/W(110) films -: art. no. 247201

被引：190

作者：

Rhie, HS

Dürr, HA

Eberhardt, W

机构：

[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany

[2] BESSY, D-12489 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.90.247201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The collapse of the magnetic exchange splitting in 7 monolayer thick epitaxial Ni/W(110) films following a femtosecond laser pulse was measured using time-resolved photoemission spectroscopy. Ultrafast demagnetization during the laser induced hot electron cascade proceeds via spin-flip excitations with a relaxation time constant of 300+/-70 fs. At longer times the electronic system cools down and the magnetization is finally reestablished with a time constant of 3.2+/-0.2 ps.

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页码：4 / 247201

页数：4

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