Investigations of the spin-Hamiltonian parameters and defect structures for Gd³⁺ ions in YMO₄ (M=V, P, As) crystals

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• 作者：Wei-Qing Yang^a ; ^b ; ^{cdywq168@163.com} ; Yuan Lin^b ; Wen Huang^b ; Hui-Zhong Zeng^b
• 关键词：Spin-Hamiltonian parameters ; Crystal- and ligand-field theory ; Defect structures ; Gd3+ ; YMO4 (M=V ; P ; As)
• 刊名：Physica B
• 出版年：2012
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：15 April, 2012
• 卷：407
• 期：8
• 页码：1268-1271
• 文件大小：142 K

摘要

A 56脳56 energy matrix containing the ground multiplet ⁸S_7/2 and the excited multiplets ⁶L_7/2 (where L=P, D, F, G, H, I) for 4f⁷ ion Gd³⁺ at a tetragonal crystal field and under an external magnetic field is constructed. By diagonalizing the energy matrix, the spin-Hamiltonian parameters (g factors g_{鈥?/sub>, g鈯?/sub> and zero-field splittings b2⁰, b4⁰, b4⁴, b6⁰, b6⁴) for Gd³⁺ ion at the tetragonal Y³⁺ site of YMO4 (M=V, P, As) crystals are calculated. The calculated results are in reasonable agreement with the experimental values. The defect structures of Gd³⁺ centers in YMO4 crystals are estimated from the calculation. The results are discussed.}