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新型稀磁半导体Zn_(1-x)Co_xS光谱特性的实验研究
Experimental Study of Spectra in New Diluted Magnetic Semiconductor Zn1-xCoxS
【摘要】 在73~300K温度范围内,首次测量了不同组分的新型稀磁半导体Zn_(1-x)Co_xS(x=0.001,0.01,0.03,0.048,0.053,0.063)的近红外和可见区的吸收光谱和磁圆二色谱。观测到一系列吸收峰和磁圆二色谱峰,两者互相对应,其峰位与样品组分x值无关。它们分别对应于Co ̄(2+)离子在T_d对称的晶体场中不同能级间的跃迁。
【Abstract】 Absorption and Magnetic Circular Dichroism (MCD ) spectra have been measured in a new diluted magnetic semiconductor Zn1-xCoxS(with x=0. 001,0. 01,0. 03,0. 048,0. 053 and 0. 063)at temperature 73K to 300K in visible and near in-frared region respectively for the first time.A series of absorption and MCD spectra have been observed. Both of the spectra are in good agreement and the peaks are in-dependent on the composition of sample and corresponding to the transitions between the different energy levels of Co ̄(2+)ion in a crystal field of Td symmetry.
【Key words】 diluted magnetic semiconductor; absorption spectra; magnetic circular dichroism spectra;
- 【文献出处】 北京大学学报(自然科学版) ,ACTA SCICENTIARUM NATURALUM UNIVERSITIS PEKINESIS , 编辑部邮箱 ,1995年05期
- 【分类号】O472
- 【被引频次】6
- 【下载频次】101