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151,153Eu electron paramagnetic resonance in SrMoO4 and determination of signs of spin Hamiltonian parameters at different temperatures

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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 0 n | of the spin Hamiltonian decrease with increasing temperature; however, the parameter b 44 increases. The results of the study have demonstrated that |b 02 (T)/P 02 (T)| ∼ const for 151,153Eu in this single crystal.

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Correspondence to A. D. Gorlov.

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Original Russian Text © A.D. Gorlov, 2014, published in Fizika Tverdogo Tela, 2014, Vol. 56, No. 11, pp. 2115–2120.

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Gorlov, A.D. 151,153Eu electron paramagnetic resonance in SrMoO4 and determination of signs of spin Hamiltonian parameters at different temperatures. Phys. Solid State 56, 2185–2190 (2014). https://doi.org/10.1134/S1063783414110080

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  • DOI: https://doi.org/10.1134/S1063783414110080

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