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掺有Cr3+的LaAlO3晶体的吸收光谱和电子顺磁共振谱的解释

, PP. 491-494

Keywords: LaAlO3晶体,Cr3+离子,电子顺磁共振,晶体场和配位场

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Abstract:

采用赵敏光提出的双ξd轨道模型,利用完全对角化的方法统一地解释了掺有Cr3+离子杂质的LaAlO3晶体的吸收光谱和电子顺磁共振谱,所得结果与实验符合得很好.还根据实验值拟合得到畸变了的键角为54.86°.研究表明高阶微扰公式是一种近似的方法,微扰公式本身并无法确定被略去的项是否能很快地收敛,因而是不太可靠的,不适用于研究结构畸变,而应采用完全对角化方法.

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