Measurements of Photorefractive Properties in BaTiO3:Co

D. Rytz, B. Wechsler, M. H. Garrett, C. C. Nelson
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Abstract

In the past, the photorefractive properties of BaTiO3 crystals doped with chromium [1] and iron [2, 3] have been described. Iron impurities, present in nominally undoped .crystals at levels between 40 and 150 ppm, have been identified as the microscopic centers correlated with the photorefractive effect [4]. The observed photorefractive effect in high purity crystals, however, with an iron level claimed to be smaller than 0.3 ppm [3], has been interpreted as evidence for another photorefractive species in these samples. The exact role of transition metal dopants in photorefractive BaTiO3 is still unclear.
BaTiO3:Co光折变特性的测量
在过去,已经对掺杂铬[1]和铁[2,3]的BaTiO3晶体的光折变特性进行了描述。铁杂质存在于名义上未掺杂的晶体中,含量在40至150 ppm之间,已被确定为与光折变效应相关的微观中心[4]。然而,在高纯度晶体中观察到的光折变效应,铁含量声称小于0.3 ppm[3],已被解释为这些样品中存在另一种光折变物质的证据。过渡金属掺杂剂在光折变BaTiO3中的确切作用尚不清楚。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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