Calculation of the spin-lattice coupling coefficientsG 11 andG 44 for GaP: Fe3+ crystal

Summary A uniform und simple method suitable to alld ⁿ ions is established for the calculation of spin-lattice coupling coefficientsG ₁₁ andG ₄₄ inT _d symmetry. According to the method, the coefficientsG ₁₁ andG ₄₄ for Fe³⁺ ion in GaP crystal have been obtained from the high-order perturbation formulae of zero-field splitting in tetragonal and trigonal fields based on the spin-orbit coupling mechanism. The calculated results show good agreement with the experimental findings. The author of this paper has agreed to not receive the proofs for correction. The project supported by National Natural Science Foundation of China.