MgTiO_3:Fe^(3+)(Mn^(2+))的EPR参量D与局域结构的研究  

Investigation of EPR parameters D and local structures for MgTiO_3 : Fe^3+ (Mn^2+) crystals.

作　　者：李福珍[1] 李兆民[1] 

机构地区：[1]四川师范大学物理系,四川成都610066

出　　处：《浙江大学学报（理学版）》2003年第1期31-34,61,共5页Journal of Zhejiang University（Science Edition）

基　　金：四川省教育厅重点科研基金资助项目(N0.143)

摘　　要：用晶体场理论研究了MgTiO3:Fe3+(Mn2+)的EPR参量D和掺杂晶体局域结构间的内在联系,计算值与实验值符合好.结果表明,掺杂后,MgTiO3:Fe3+和MgTiO3:Mn2+局域结构的畸变均趋向Oh对称,且MgTiO3:Fe3+的畸变程度大于MgTiO3:Mn2+.Based on the crystal-field theory, the intimate relationship between the EPR parameters D and the local structures of the MgTiO3 = Fe3+ (Mn2+) crystals have been studied. The good agreement between the calculated and the observed values of D shows that the distortions of the local structures for the MgTiO3 = Fe3+ (Mn2+) crystals tend towards the cubic symmetry (Oh) and the distortion of the local structure for the MgTiO3 : Fe3+ crystal is larger than that in the MgTiO3 : Mn2+ crystal.

关 键 词：MgTiO3:Fe^3+(Mn^2+) EPR 局域结构 晶体场理论 零场分裂值 基态 电子顺磁共振 

分 类 号：O731[理学—晶体学]