title: Gyromagnetic factor of Cr4+ ions in forsterite.
abstract: The average value of g factor (i.e., g ) of Cr4+ ions in forsterite (Mg2SiO4) is calculated with the cubic symmetry approximation from the complete high-order perturbation formula of g factor for 3d2 ion in cubic tetrahedral cluster. In the formula, the contribution to g factor from the charge-transfer mechanism (which is neglected in the crystal-field theory) is considered in addition to that from the widely used crystal-field mechanism. From the calculations, the reasonable observed value of g is suggested (note: the experimental values of g by various authors are scattered) and the important contribution of charge-transfer mechanism to g factor can be found.
authors.affiliation: Department of Material Science, Sichuan University, Chengdu 610064, PR China. zhengwc1@163.com
authors.forename: Wen-Chen
authors.initials: WC
authors.lastname: Zheng
authors.forename: Xiao-Xuan
authors.initials: XX
authors.lastname: Wu
authors.forename: Ying-Juan
authors.initials: YJ
authors.lastname: Fan
mesh_terms: D002857:Chromium / Q000737:chemistry*; D003460:Crystallization; D004578:Electron Spin Resonance Spectroscopy; D004583:Electrons; D007477:Ions; D008274:Magnesium / Q000737:chemistry; D008280:Magnetics; D015233:Models, Statistical; D010100:Oxygen / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D017655:Silicon Compounds / Q000737:chemistry*
chemical_list: D007477:Ions; D017655:Silicon Compounds; C503823:forsterite; D002857:Chromium; D008274:Magnesium; D010100:Oxygen; D012825:Silicon