Cr3+：MgAl2O4晶体EPR参量及其电子精细光谱的研究

波谱学杂志 ›› 2004, Vol. 21 ›› Issue (1): 25-32.

Cr³⁺：MgAl₂O₄晶体EPR参量及其电子精细光谱的研究

魏群^{1, 2*}, 杨子元^1,3

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

收稿日期:2003-06-09 修回日期:2003-11-24 出版日期:2004-03-05 发布日期:2004-03-05
基金资助:
陕西省教育厅科学计划项目(02JK045)与宝鸡文理学院重点科研基金资助项目.

EPR PARAMETERS OF Cr³⁺：MgAl₂O₄ CRYSTAL AND ITS HYPER-FINE ELECTRONIC SPECTRA

WEI Qun^{1, 2*}, YANG Zi-Yuan^1,3

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

Received:2003-06-09 Revised:2003-11-24 Online:2004-03-05 Published:2004-03-05
Supported by:
陕西省教育厅科学计划项目(02JK045)与宝鸡文理学院重点科研基金资助项目.

摘要/Abstract

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.

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

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.

Key words: EPR, complete diagonalization method (CDM), Cr³⁺：MgAl₂O₄crystal, spin-spin interaction, spin-other-orbit interaction

中图分类号:

O737
O734.3

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.

WEI Qun, YANG Zi-Yuan. 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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Cr³⁺：MgAl₂O₄晶体EPR参量及其电子精细光谱的研究

EPR PARAMETERS OF Cr³⁺：MgAl₂O₄ CRYSTAL AND ITS HYPER-FINE ELECTRONIC SPECTRA

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