Investigations of the g-factors and local phase-transition behavior for Ni3+ ion in the tetragonal phase of RbCaF3 crystal
作者： Shun-Ru Zhang , Hong-Gang Liu , Gui-Qiang Qu , Wen-Chen Zheng
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摘要: The EPR g factors g(parallel to) and g(perpendicular for Ni3+ ion (created by room-temperature X-irradiation of nickel-doped RbCaF3) in the tetragonal phase RbCaF3 crystal are calculated from second-order perturbation formulas based on a cluster approach high-spin 3d(7) ions octahedral clusters. results reasonable agreement with experimental values. local phase-transition behavior impurity center is also estimated calculation. It found that unlike intrinsic one host (in particular, fluorine octahedra surrounding cations change compression to elongation center). discussed.
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