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在90~300K温度范围测量和研究了组分为0.2≤x≤0.6的稀磁半导体Zn1-xMnxTe的法拉第旋转随入射光子能量和组分的变化.利用单振子模型获得了激子能量与组分的关系.还研究了法拉第旋转随温度的变化,得到激子能量的温度系数为-7.3×10-6eV/K(x=0.3),首次从法拉第旋转测量获得了该晶体的居里温度.
The Faraday rotation of dilute magnetic semiconductors Zn1-xMnxTe with 0.2≤x≤0.6 was measured with the energy and composition of incident photons in the temperature range of 90 ~ 300K. The relationship between the exciton energy and the composition was obtained by using the unimodal model. The temperature dependence of the Faraday rotation with temperature was also studied. The temperature coefficient of the exciton energy was found to be -7.3 × 10-6eV / K (x = 0.3). The Curie temperature of the crystal was obtained from the Faraday rotation measurement for the first time.