Abstract
AbstractThe 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; $b_2^0 $ = 386.15 ± 0.11; $b_4^0 $ = −12.65 ± 0.07; $b_6^0 $ = 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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