Spectroscopic analysis demonstrates distinct Fe2+ and Tb3+ paramagnetic centers in YAlO3 crystals, highlighting impurity localization within the crystal lattice.
A YAlO3 crystal with an admixture of iron was studied by broadband EPR spectroscopy. Two types of paramagnetic centers were found. The energy level scheme of one of them is a singlet and a doublet with a splitting of 215.2 GHz. This center is presumably associated with the Fe2+ ion. The second center was identified as the Tb3+ ion, which entered the crystal as an uncontrolled impurity. The localization of the impurity ion in the YAlO3 crystal lattice is determined for each case. Within the framework of the existing theory, calculations are carried out and spectral parameters are determined.
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Asatryan et al. (2021) studied this question.
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