SPIN-LATTICE RELAXATION IN FERROMAGNETS STUDIED BY TIME-RESOLVED SPIN-POLARIZED PHOTOEMISSION

被引：43

作者：

VATERLAUS, A

BEUTLER, T

GUARISCO, D

LUTZ, M

MEIER, F

机构：

[1] Laboratorium für Festkörperphysik, Eidgenössische Technische Hochschule Hönggerberg

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.46.5280

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The spin-lattice relaxation time tau(sl) is the characteristic time needed for the energy transfer between the lattice and the spin system. It is demonstrated that tau(sl) can be determined with laser-induced spin-polarized photoemission. Upper and lower limits are derived from a single-pulse experiment using pulses of various time durations. It is found that tau(sl) of iron is shorter than 20 ns but longer than 30 ps. A direct measurement of tau(sl) is possible with a pump-probe experiment. One laser pulse heats the sample and a second time-delayed pulse is used to probe the magnetic state. Tau(sl) is found to be 100+/-80 ps for ferromagnetic gadolinium.

引用

页码：5280 / 5286

页数：7

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