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Electron paramagnetic resonance of Gd3+ ion in monocrystal YAl3(BO3)4

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Abstract

The ground state of Gd3+ ions substituting for Y3+ in YAl3(BO3)4 single crystal has been studied by EPR method. Spin Hamiltonian parameters and their signs for Gd3+ ion in trigonal symmetry (gz = 1.9893 ± 0.0002, gx = gy = 1.9860 ± 0.0002; equation image = 386.15 ± 0.11; equation image = −12.65 ± 0.07; equation image = 0.35 ± 0.10) were determined. Structural phase transition manifested as a discontinuous change of splitting of spectrum was observed near 157 K.

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