EPR Studies of Mn^<2+> in Cd_<1-x>Mg_xTe Mixed Single Crystals

概要

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The EPR for Mn^<2+> (0.01%) in Cd_<1-x>Mg_xTe (0<__-x<__-0.2) mixed crystals grown by the Bridgeman technique has been studied at the X-band. The hyperfine interaction constants A and g-factors have been found to be less dependent on the composition x than the crystalline field constants a. An empirical equation has been formulated in order to obtain the EPR parameters for Mn^<2+> in II-VI compounds as a whole. This law shows an exponential dependence of the EPR parameters on the effective distance between the magnetic ion and the anion. This law is used to estimate unknown parameters for Mn^<2+> in Cd^<1-x>Te as a function of x. Some lines in the EPR spectra showed a broadening with x. The temperature dependence of the constants A for these crystals has been found to be a little larger than those for ionic crystals such as MgO, CaF_2, and NaCl. The composition dependence of the Debye temperatures has been determined from these data. Measurements were also made of the temperature dependence of the peak-to-peak and half-width of the signal in order to study the effective number of Mn^<2+> ions in the crystal.
社団法人日本物理学会の論文
1972-03-05