Abstract

The influence of light exposure on the magneto-optical Kerr effect in the ferromagnetic semiconductor europium sulfide EuS has been studied. It has been experimentally established that when a sample is exposed to the light with a photon energy greater than the band gap, photoinduced magnetization occurs, which is associated with the formation of magnetic polarons with a large magnetic moment of about 3000 μ_B. The polarons are excited in a narrow temperature range of 12–18 K and form a superparamagnetic ensemble with an average polaron lifetime of 13 μs. A method for observing photo-induced magnetization using optical pump-probe technique has been described.

中文翻译：

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硫化Euro EuS中的光致磁光Kerr效应

摘要

研究了铁磁半导体硫化sulf EuS中曝光对磁光Kerr效应的影响。实验已经证实，当将样品暴露于光的一个光子能量大于带隙，光诱导磁化发生时，其与形成磁性极化子与约3000μ的大的磁矩相关联的_乙。极化子在12-18 K的狭窄温度范围内被激发，形成超顺磁性集合体，平均极化子寿命为13μs。已经描述了使用光学泵浦探针技术观察光致磁化的方法。