X-ray-induced conductivity in iron-doped lithium niobate crystals
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Data
2003-07-01
Autores
Berben, D.
Sturman, B.
Freschi, A. A. [UNESP]
Buse, K.
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Resumo
Illumination of photorefractive, iron-doped lithium niobate crystals (LiNbO 3:Fe) with x-rays generates a conductivity that we determine from the speed of hologram erasure. The doping levels of the crystals and the acceleration voltage of our x-ray tube are varied. A theoretical model is presented, which describes the obtained results. A decrease of the conductivity with increasing Fe 2+ concentration can be explained by assuming that holes are the dominant charge carriers for this short-wavelength illumination.
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Palavras-chave
iron derivative, lithium, niobium, oxygen derivative, concentration (parameters), conductance, crystal structure, holography, illumination, light refraction, theory, X ray analysis
Como citar
Physical Review B - Condensed Matter and Materials Physics, v. 68, n. 3, p. 351201-351204, 2003.