Light induced charge and absorption changes in BaTiO3as studied by simultaneous ESR and optical extinction measurements

Autor:	H. Kröse, E. Possenriede, G. Godefroy, O. F. Schirmer
Rok vydání:	1992
Předmět:	Wavelength Paramagnetism Photochromism Materials science business.industry Analytical chemistry Light induced Optoelectronics Charge (physics) Condensed Matter Physics business Absorption (electromagnetic radiation) Electronic Optical and Magnetic Materials
Zdroj:	Ferroelectrics. 125:343-348
ISSN:	1563-5112 0015-0193
DOI:	10.1080/00150199208017091
Popis:	By investigating the concentrations of paramagnetic centers in two nominally undoped BaTiO3 single crystals at low temperatures as depending on illumination with light of varying wavelengths the resulting charge transfer processes could partly be identified. The corresponding photochromic behavior of the crystals was studied by measuring optical absorption simultaneously with ESR. Essentially two trap levels are involved: a deep one (Fe4+/3+) and shallow ones, which have been characterized by joint ESR and optical absorption measurements.
Databáze:	OpenAIRE
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