ABINITIO INVESTIGATION OF MICROSCOPIC ENHANCEMENT FACTORS IN TUNING THE MAGNETOOPTICAL KERR EFFECT

被引:76
作者
OPPENEER, PM
STICHT, J
MAURER, T
KUBLER, J
机构
[1] Institut für Festkörperphysik, Technische Hochschule, Darmstadt, W-6100
来源
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1992年 / 88卷 / 03期
关键词
D O I
10.1007/BF01470918
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The microscopic quantities that determine the magnitude and frequency position of peaks in the Kerr rotation spectrum are studied on the basis of first-principles band-structure theory. The transition metals Fe, Co and Ni serve as model systems. The magnitude of the magneto-optical Kerr effect (MOKE) is basically brought about by the spin-orbit (SO) coupling strength and it is shown that the Kerr rotation scales linearly with the SO-coupling. Exchange splitting (or magnetization) is found to influence the Kerr effect in a rather complicated way: enlarging the magnetization can both enhance and diminish spectral peaks. A strong effect is found for the dependence of the position of spectral peaks on the lattice spacing: a 3 to 6% increase in lattice parameters can lead to shifts of about 1 eV of the main MOKE peak.
引用
收藏
页码:309 / 315
页数:7
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