Ultrafast magnetism: The magneto-optical Kerr effect and conduction electrons

被引：5
|
作者：
Gort, R. [1 ,2 ]
Buehlmann, K. [1 ]
Saerens, G. [1 ]
Daester, S. [1 ]
Vaterlaus, A. [1 ]
Acremann, Y. [1 ]
机构：
[1] Swiss Fed Inst Technol, Lab Solid State Phys, CH-8093 Zurich, Switzerland
[2] European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany
来源：
APPLIED PHYSICS LETTERS | 2020年 / 116卷 / 11期
基金：
瑞士国家科学基金会;
关键词：
SPIN DYNAMICS; PHOTOEMISSION; DEMAGNETIZATION; NI;
D O I：
10.1063/1.5143115
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Most experiments on ultrafast magnetodynamics have been conducted using the magneto-optical Kerr effect. Here, we compare the Kerr effect's magnetic sensitivity to the spin dynamics measured by photoemission. The magnetization dynamics on an Fe/W(110) thin film are probed by spin-resolved photoemission spectroscopy and the Kerr effect. The results reveal similarities between the spin dynamics at low binding energy and the response probed by the Kerr effect. Therefore, the Kerr effect probes states relevant for spin transport and spin flips but may not be sensitive to the entire magnetic moment in femtosecond spin dynamics experiments.
引用
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页数：5
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