Spectroscopic properties of Ni2+ ions substituted in the unidimensional compound CsCdBr3 were investigated from 9 to 300 K. The structured features of the absorption spectrum have been interpreted on the assumption of a trigonal distortion of the Ni2+ site. Four emissions were observed and assigned to the 1T2 →3T2,3T1,1E and to the 3T2 →3A2 transitions in order of decreasing energy. Energy‐level calculations were performed in the usual cubic model and the results compared to the values obtained in a trigonal‐field framework. The lifetimes have been measured and fitted by the Mott law and using the Struck and Fonger model.
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© 1992 American Institute of Physics.
1992
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