Spin-Hamiltonian parameters and defect structure for Co4+ in Al2O3:Mg2+ crystal

被引：0
|
作者：
Jia Gu-Ming [1 ]
He Lv [1 ,2 ]
Zheng Wen-Chen [1 ,3 ]
机构：
[1] Sichuan Univ, Dept Mat Sci, Chengdu 610064, Peoples R China
[2] Zhejiang Normal Univ, Coll Math Phys & Informat Engn, Jinhua 321004, Peoples R China
[3] Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 21-22期
关键词：
Electron paramagnetic resonance; Defect structure; Crystal-field theory; Co4+; Al2O3;
D O I：
10.1016/j.physb.2008.07.035
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The spin-Hamiltonian parameters (g factors g(parallel to), g(perpendicular to) and hyperfine structure constants A(parallel to) and A(perpendicular to)) for Co4+ ion in Al2O3:Mg2+ crystals are calculated from the resonance theory related to the low-spin T-2(2) term in trigonal symmetry. The calculated values are in reasonable agreement with the observed values. From the calculation, the defect structure of Co4+ Center in Al2O3: Mg2+ crystal is obtained. The result is consistent with the expectations based on the electrostatic interaction and electron cloud overlap. The signs of hyperfine structure constants A(parallel to) and A(perpendicular to) are suggested. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3950 / 3952
页数：3
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