铕硫属化物中法拉第旋转向磁化的转换
Converting Faraday rotation into magnetization in europium chalcogenides
摘要：
我们提出了一个简单的半经典模型来维持，在铕硫属化物（EuX），法拉第旋转（FR）的透明间隙是成比例的样品的磁化强度，无论材料的磁相，温度，或施加的磁场。该模型是通过在EuSe的FR和磁化测量在温度区间1.7- 300 K，覆盖所有EuSe磁性相（顺磁，反铁磁I型或II型，亚铁磁和铁磁）进行验证。此外，通过结合半经典模型与EuX的显式电子能量结构，磁化强度和FR之间的比例系数被证明是只依赖于波长和带隙。由于其简单，该模型具有教学价值，此外，它提供了一个工作工具，转换FR到磁化在EuX。可能的扩展模型到其他本征磁性半导体进行了讨论。
英文摘要：
We present a simple semiclassical model to sustain that in europium chalcogenides (EuX), Faraday rotation (FR) in the transparency gap is proportional to the magnetization of the sample, irrespective of the material's magnetic phase, temperature, or applied magnetic field. The model is validated by FR and magnetization measurements in EuSe in the temperature interval 1.7-300K, covering all EuSe magnetic phases (paramagnetic, antiferromagnetic type I or type II, ferrimagnetic and ferromagnetic). Furthermore, by combining the semiclassical model with the explicit electronic energy structure of EuX, the proportionality coefficient between magnetization and FR is shown to be dependent only on the wavelength and the band gap. Due to its simplicity, the model has didactic value, moreover, it provides a working tool for converting FR into magnetization in EuX. Possible extension of the model to other intrinsic magnetic semiconductors is discussed.
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