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首页> 外文期刊>Physica status solidi, B. Basic research >Investigations of spin-Hamiltonian parameters and defect structure for Mn4+ in Al2O3 from a two-mechanism model
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Investigations of spin-Hamiltonian parameters and defect structure for Mn4+ in Al2O3 from a two-mechanism model

机译:基于两种机理模型研究Al2O3中Mn4 +的自旋哈密顿参数和缺陷结构

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摘要

The complete high-order perturbation formulas based on a two-mechanism model for the spin-Hamiltonian (SH) parameters (g-factors g(parallel to), g(perpendicular to), and zero-field splitting D) of 3d(3) ions in trigonal octahedral sites are derived. In the model, not only the conventional contribution to SH parameters from the crystal-field (CF) mechanism, but also that from the charge-transfer (CT) mechanism (which is omitted in the CF theory) are included. From these formulas, the SH parameters of Mn4+ replacing Al3+ in Al2O3 crystal are calculated by using the parameters related to the optical spectral data and the defect structure of the studied system. The results (including the relative importance of the CT mechanism on the SH parameters and the defect structure of Mn4+ impurity center) are discussed. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
机译:基于两力学模型的3d(3的自旋哈密顿(SH)参数(g因子g(平行),g(垂直于)和零场分裂D)的完整高阶摄动公式)导出八边形八面体位置的离子。在该模型中,不仅包括常规的晶体场(CF)机制对SH参数的贡献,还包括电荷传输(CT)机制对循环力学参数的贡献(在CF理论中被省略)。根据这些公式,使用与所研究系统的光谱数据和缺陷结构有关的参数,计算出Al2O3晶体中Mn4 +替代Al3 +的SH参数。讨论了结果(包括CT机制对SH参数的相对重要性以及Mn4 +杂质中心的缺陷结构)。 (C)2008 WILEY-VCH Verlag GmbH&Co. KGaA,Weinheim。

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