Abstract
In this paper, the electron paramagnetic resonance (EPR) parameters in RbCdF3:Cr3+ have been studied by means of energy matrices and the Newman superposition model, the theoretical results are in excellent agreement with the experimental ones. The existence of Rb+ vacancy and the lattice distortion have been verified. The EPR parameters arising from the Rb+ vacancy itself and the crystal lattice distortion are analyzed and calculated. We obtain that the six ligand F− ions move to the central Cr3+ ion by Δ = 0.0013 nm, and the front three F− ions rotate 2.98° away from the [111] axis while the back three F− ions rotate 1.016° toward it.
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