| CaTiO_3中Co~(2+)离子各向异性g因子的理论研究 |
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| 引用本文： | 鲁广铎,邬劭轶,张华明,姚劲松. CaTiO_3中Co~(2+)离子各向异性g因子的理论研究[J]. 电子科技大学学报(社会科学版), 2008, 0(6) |
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| 作者姓名： | 鲁广铎 邬劭轶 张华明 姚劲松 |
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| 作者单位： | 电子科技大学物理电子学院; |
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| 摘 要： | 利用基于离子簇模型的正交对称中3d7离子g因子微扰公式,计算了CaTiO3中Co2+的各向异性g因子gx、gy和gz,与此相关的晶场参量由杂质局部结构和重叠模型得到。研究发现,由于杂质Co2+与母体Ti4+存在电荷和离子半径的差异,将引起两个方向的键长发生5.6%的相对改变,从而导致明显的正交畸变。由此得到的g因子理论值与实验较为符合。
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| 关 键 词： | CaTiO_3 Co~(2+)离子 电子顺磁共振 g因子 |
Investigations of the Anisotropic g Factors for Co~(2+) in CaTiO_3 |
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| LU Guang-duo,WU Shao-yi,ZHANG Hua-ming,, YAO Jin-song. Investigations of the Anisotropic g Factors for Co~(2+) in CaTiO_3[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2008, 0(6) |
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| Authors: | LU Guang-duo WU Shao-yi ZHANG Hua-ming YAO Jin-song |
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| Affiliation: | LU Guang-duo,WU Shao-yi,ZHANG Hua-ming,, YAO Jin-song (School of Physical Electronics,University of Electronics Science , Technology of China Chengdu 610054) |
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| Abstract: | The anisotropic g factors gx,gy and gz for Co2+ in CaTiO3 are theoretically investigated from the perturbation formulas of the g factors for a 3d7 ion in orthorhombically distorted octahedra based on the cluster approach.The related orthorhombic field parameters are determined from the local structure of the studied impurity center and the superposition model.Because the impurity Co2+differs from the host Ti4+ in ionic radius and charge,the Co-O band lengths along two directions may suffer a relative variat... |
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| Keywords: | CaTiO_3 Co~(2+) electron paramagnetic resonance g factors |
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