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Electron Paramagnetic Resonance, Optical, and Electronic Structure Studies of Photorefractive Barium Titanate
Author(s) -
Schwartz Robert N.,
Wechsler Barry A.,
Rytz Daniel
Publication year - 1990
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1990.tb06437.x
Subject(s) - photorefractive effect , barium titanate , impurity , ferroelectricity , electron paramagnetic resonance , materials science , ion , condensed matter physics , resonance (particle physics) , chemistry , optoelectronics , nuclear magnetic resonance , dielectric , physics , atomic physics , organic chemistry
Barium titanate (BaTiO 3 ) is an important electrooptic ferroelectric oxide material which exhibits the unusual optical nonlinearity of photorefractivity. There is evidence that the photorefractive effect, which refers to the change in the index of refraction of the crystal by the action of light, is related to the presence of defects/impurities such as transition metal ions and/or cation or anion vacancies. This paper will review our electron paramagnetic resonance, optical, and theoretical eletronic structure studies aimed at probing the nature of the defects/impurities in BaTiO 3 and their role in the photorefractive effect.