INVESTIGATION OF THE PHOTOTHERMALLY MODULATED FERROMAGNETIC-RESONANCE SIGNAL FROM MAGNETOSTATIC MODES IN YTTRIUM-IRON-GARNET FILMS

被引：7

作者：

SCHREIBER, F

HOFFMANN, M

VONGEISAU, O

PELZL, J

机构：

[1] Arbeitsgruppe Festkörperspektroskopie, Fakultät für Physik und Astronomie, Ruhr-Universität, Bochum

来源：

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 1993年 / 57卷 / 06期

关键词：

65.90; 75.00; 76.50;

D O I：

10.1007/BF00331757

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The conventional and photothermally modulated (PM) ferromagnetic resonance (FMR) of magnetostatic modes (MSM) in yttrium iron garnet (YIG) films have been investigated as a function of temperature. Approaching the ferrimagnetic transition at T(c) = 560 K a strong enhancement of the PM-FMR signal amplitude is observed which is accompanied by a change of the signal shape. The observations are discussed in the framework of a model that takes into account the temperature derivatives of those quantities that contribute to the high-frequency susceptibility. At temperatures still below T(c) a paramagnetic line emerges. The MSM disappear in a state of finite magnetization which is explained on the basis of damping of the MSM being important in the vicinity of the magnetic phase transition. Additionally, frequency and power dependent measurements are presented and the imaging ability of PM-FMR is demonstrated.

引用

页码：545 / 551

页数：7

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