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本文首次报道半磁半导体Zn_(0.97)Co_(0.03)S和Zn_(0.95)Co_(0.05)Se中铁杂质的红外吸收光谱.对Zn_(0.97)Co_(0.03)S:Fe,实验发现了 ZnS中 Fe~(2+d)电子跃迁谱中未观察到的位于 2999.8cm~(-1)的新话线;对Zn_(0.95)Co_(0.05)Se:Fe,实验发现了ZnSe中Fe~(2+d)电子跃迁谱中未观察到的位于2778cm~(-1)的新话线.变温与磁光研究以及理论分析表明,新的吸收谱线起源于Fe~(2+)-Co~(2+)对Fe~(2+d)电子的A_1(~5E)、T_1(~5E)→T_2(~5T_2)跃迁.与d-d电子互作用相比,Co~(2+)引起的晶格畸变对Fe~(2+)跃迁的影响可忽略不计.
In this paper, the infrared absorption spectra of iron impurities in semi-magnetic semiconductors Zn_ (0.97) Co_ (0.03) S and Zn_ (0.95) Co_ (0.05) Se have been reported for the first time.For Zn_ (0.97) Co_ (0.03) For the Zn ~ (0.95) Co_ (0.05) Se: Fe, we found that the Fe ~ (2) doping in ZnSe was not observed in the Fe ~ (2 + d) electronic transition spectrum at 2999.8 cm ~ (-1) + d) New lines that are unobserved at 2778cm -1 in the electronic transition spectrum.Variation and magneto-optical studies and theoretical analysis show that the new absorption line originates from Fe 2+ (Co 2+ (Superscript 2+) transitions on the A 1 (~ 5E) and T 1 (~ 5E) → T 2 (~ 5T 2) transitions of Fe ~ (2 + The effect of distortion on Fe ~ (2+) transition is negligible.