| Cr3+：MgAl2O4晶体EPR参量及其电子精细光谱的研究 |
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| 引用本文： | 魏群,杨子元.Cr3+：MgAl2O4晶体EPR参量及其电子精细光谱的研究[J].波谱学杂志,2004,21(1):25-32. |
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| 作者姓名： | 魏群 杨子元 |
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| 作者单位： | 1.宝鸡文理学院物理系，陕西宝鸡 721007;
2.西北大学物理系，陕西西安 710069; ;
3.西安电子科技大学微电子所，陕西西安 710071 |
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| 基金项目： | 陕西省教育厅资助项目，宝鸡文理学院校科研和教改项目 |
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| 摘 要： | 考虑了SS(Spin-Spin)作用和SOO(Spin-Other-Orbit)作用，采用完全对角化方法，结合自旋Hamiltonian理论，研究了Cr3+∶MgAl2O4晶体EPR参量及其吸收光谱，理论与实验符合甚好. 在此基础上，进一步研究了4A2(3d3)离子EPR参量的微观起源. 研究表明，EPR参量起源于四种微观机制：(1) SO(Spin-Orbit) 耦合机制；(2) SS耦合机制；(3)SOO耦合机制；(4) SO～SS～SOO总联合作用机制. 在这些机制中，SO机制是最主要的.
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| 关 键 词： | EPR参量 完全对角化方法 Cr3+：MgAl2O4晶体 SS作用 SOO作用 联合作用机制 |
| 文章编号： | 1000-4556(2004)01-0025-08 |
| 收稿时间： | 2003-06-09 |
| 修稿时间： | 2003年6月9日 |
EPR PARAMETERS OF Cr3+ :MgAl2O4 CRYSTAL AND ITS HYPER-FINE ELECTRONIC SPECTRA |
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| WEI Qun.EPR PARAMETERS OF Cr3+ :MgAl2O4 CRYSTAL AND ITS HYPER-FINE ELECTRONIC SPECTRA[J].Chinese Journal of Magnetic Resonance,2004,21(1):25-32. |
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| Authors: | WEI Qun |
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| Institution: | 1.Department of Physics, Baoji University of Arts and Science, Baoji 721007, China;;
2.Department of Physics, Northwest University, Xi'an 710069, China;
3.Microelectronics Institute, Xidian University, Xi'an 710071, China |
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| Abstract: | The EPR parameters and the hyper-fine electronic spectra of Cr3+: MgAl2O4 crystal were studied using the full energy matrices and the spin Hamiltonian theory. Spin spin (SS) interaction and spin-other-orbit (SOO) interaction were taken into account. The results obtained by theoretical simulation were in good agreement with the experimental findings. The microscopic mechanisms determining the EPR parameters for the 4A2(3d3) state were also studied. The EPR parameters were found to be dependent on four microscopic mechanisms, namely the SO coupling mechanism, the SS coupling mechanism, the SOO coupling mechanism and the SO～SS～SOO combined coupling mechanism. Among the mechanisms, the SO coupling mechanism seemed to be the most important. |
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| Keywords: | EPR complete diagonalization method (CDM) Cr~(3 ):MgAl_2O_4 crystal spin-spin interaction spin-other-orbit interaction |
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