Growth and optical characterization of cerium and lead-doped Bi12TiO20 sillenite single crystals by J. F. Carvalho and A. C. Hernandes

Crystal Research and Technology

Cryst. Res. Technol. 40, 847 (2005) - Abstract -

Growth and optical characterization of cerium and lead-doped Bi₁₂TiO₂₀ sillenite single crystals

J. F. Carvalho and A. C. Hernandes*

Universidade Federal de Goiás, Instituto de Física, C.P.131, 74001-970, Goiânia, GO, Brazil
*Universidade de São Paulo, Instituto de Física de São Carlos, C.P.369, 13560-970, São Carlos, SP, Brazil

Keywords	crystal growth, sillenite, BTO, photorefractive crystals
PACS	81.10.Fq, 42.70.Ln, 78.20.-e
DOI	10.1002/crat.200410444

Bi₁₂TiO₂₀ (BTO) single crystals doped with PbO and CeO₂ were grown by the Top Seeded Solution Growth (TSSG) technique from the liquid phase with nominal compositions of 10Bi₂O₃ : (1-x)TiO₂ : x PbO and 10Bi₂O₃ : (1-x)TiO₂ : xCeO₂ with x = 0.25 and 0.10. No growth-related difficulties were encountered other than those typical of sillenite crystals. Samples with good optical quality were obtained and were characterized by optical absorption, dark current, spectral photocurrent dependence, optical activity and electro-optic coefficient measurements. A comparison is made of the results of the optical measurements of doped and undoped BTO crystals.

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