151,153Eu electron paramagnetic resonance in SrMoO4 and determination of signs of spin Hamiltonian parameters at different temperatures |
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Authors: | A. D. Gorlov |
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Affiliation: | 1. Research Institute of Physics and Applied Mathematics, Ural Federal University, pr. Lenina 51, Yekaterinburg, 620083, Russia
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Abstract: | The electron paramagnetic resonance (EPR) spectra of Eu2+ impurity centers in SrMoO4 crystals have been studied in the temperature range of 1.8, 100–300 K. A hyperfine structure has been simulated for 151,153Eu of different EPR transitions observed experimentally at different temperatures and external magnetic field orientations. A unique set of all parameters of the spin Hamiltonian for the known sign of the hyperfine interaction parameters A i has been determined. It has been found that the diagonal parameters |b n 0 | of the spin Hamiltonian decrease with increasing temperature; however, the parameter b 4 4 increases. The results of the study have demonstrated that |b 2 0 (T)/P 2 0 (T)| ~ const for 151,153Eu in this single crystal. |
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