【摘要】 用透射光谱法报道和讨论了组份x=0.03和x=0.06的Cd_1-xFe_xTe单晶样品的光吸收,同时用提拉法在温度1.5～30K、磁场强度直到7T范围内测量了磁化强度与组份、温度和磁场强度的变化规律。结果表明,随着x组份的增加,Cd_1-xFe_xTe的能隙移向长波（低能）方向。根据分子场理论,采用类布里渊函数,对磁化强度实验结果进行了拟合和分析。在本文的x值范围内,理论与实验符合得很好,证实了铁离子间存在反铁磁的交换耦合。更多还原

【Abstract】 The measurements of the optical absorption in Cd_1-xFe_xTe for x=0.03, 0.06 by transmission spectroscopy have been carried out and the magnetization measurements in the temperature range 1.5K to 30K and magnetic fields up to 7T have been made by using the extraction method. It is shown that the band gap shifts towards the low energy side with the increase of x. Based on the mean field theory, a modified Brillouin function fits with the data very well. It is shown that there is an antiferromagnetic exchange coupling among Fe ions.更多还原