中国物理B ›› 1993, Vol. 2 ›› Issue (3): 213-219.doi: 10.1088/1004-423X/2/3/007
姜山a, 沈学础a, 马可军b
JIANG SHAN (姜山)a, SHEN XUE-CHU (沈学础)a, MA KE-JUN (马可军)b
摘要: The photoconductivity spectra of semimagnetic semiconductor Cd0.7Mn0.3Se have been measured at 50-300 K and in the wavelength range of 5500 ? to 8000 ?. It is found that the energy gap of Cd0.7Mn0.3Se changes with the temperature linearly, and the temperature coefficient (dEg/dT) is about -7×10-4 eV/K. A photoconductivity peak which is related to Mn2+ is also found. This peak is located around 1.85 eV, nearly unshifted with variation of the temperature. The possible transition mechanisms in Cd1-xMnxSe have been discussed in the light of group theory and crystal field theory, and the results are in good agreement with experiments.
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