Magnetic field dependence of the circular dichroism in EuTe
Magnetic field dependence of the circular dichroism in EuTe
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EuTe 圆二色性的磁场依赖性
DOI：
10.1088/0953-8984/19/40/406234
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
E. Abramof
中科院分区：
文献类型：
--
作者：
A. Henriques;G. Galgano;B L Díaz;P. Rappl;E. Abramof
研究了EuTe中吸收磁圆二色性随T = 2k时磁场的变化规律。为了从理论上描述光谱，我们建立了一个考虑晶格磁阶作为磁场函数的模型。该模型允许我们计算吸收光谱作为磁场强度的连续函数。该理论解释了在高场中看到的强烈的二向色吸收，以及它向B = 0光谱的持续演化，这是由更弱和更宽的吸收线描述的。Eu2+的自旋排列对外部磁场的依赖性完全解释了实验光谱随磁场变化的剧烈变化。
The absorption magnetic circular dichroism in EuTe was investigated as a function of the magnetic field at T = 2 K. In order to describe the optical spectra theoretically, we developed a model that takes into account the magnetic order of the lattice as a function of the magnetic field. The model allows us to calculate the absorption spectrum as a continuous function of the magnetic field intensity. The theory accounts for the strongly dichroic absorption seen at high fields, and for its continuous evolution towards the B = 0 spectrum, which is described by a much weaker and much broader absorption line. The drastic changes observed in the experimental spectra as a function of magnetic field are fully explained by the dependence of the Eu2+ spin arrangement on the external magnetic field.