【摘要】 本文首次报道半磁半导体Zn_0.97Co_0.03S和Zn_0.95Co_0.05Se中铁杂质的红外吸收光谱.对Zn_0.97Co_0.03S: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_0.95Co_0.05Se: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Fe²⁺-Co²⁺对Fe^2+d电子的A₁（⁵E）、T₁（⁵E）→T₂（⁵T₂）跃迁.与d-d电子互作用相比,Co²⁺引起的晶格畸变对Fe²⁺跃迁的影响可忽略不计.更多还原

【Abstract】 Infrared absorption spectra of Fe impurity in Semimagnetic semiconductors Zn_0.97Co_0.03S,Zn_0.95Co_0.05Se are reported for the first time. New absorption line at 2999.8cm^-1 of Zn_0.97Co_0.03S:Fe which never observed in absorption spectrum of ZnS: Fe, and new line at2778.0cm^-1 of Zn_0.95 Co_0.05Se:Fe which never observed in absorption spectrum of ZnSe:Fe were observed and ascribed to inner d-electron excitation absorption lines of Fe²⁺ inFe²⁺-Co²⁺ pair, Experiments at various temperatures under magnetic field, and theoreticaldiscussion have approved this ascription. Compared with d-d interaction, lattice distortion ofFe²⁺ induced by Co²⁺ has negligible affect on d-electron states of Fe²⁺ ion.更多还原