Crystal growth of Bi2TeO5 by a double crucible Czochralski method

• Published in: Journal of crystal growth Vol. 401; pp. 795 - 797
• Main Authors: Carvalho, J.F., Fabris, Z.V., de Oliveira, I., Frejlich, J.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.09.2014; Elsevier
• Subjects: A2. Double crucible technique; A2. Growth from melt; B1. Bismuth compounds; B2. Photorefractive materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Growth from melts; zone melting and refining; Materials science; Methods of crystal growth; physics of crystal growth; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Theory and models of crystal growth; physics of crystal growth, crystal morphology and orientation; A2. Double crucible technique; B1. Bismuth compounds; B2. Photorefractive materials; A2. Growth from melt; Crystal growth; Photonic band gap; Crucibles; Czochralski method; XRD; Crystal perfection; Operating conditions; Monocrystals; Optical transmission; Optical properties; Growth mechanism; Bismuth; Bismuth compounds; Growth from melt; Absorption spectra; Coloration; Crystal growth from melts
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2013.11.098

Single crystals of bismuth tellurite (Bi2TeO5) were grown by a double crucible Czochralski method at different pulling and rotation rates, ranging from 0.1mm/h to 0.8mm/h and from 5rpm to 20rpm, respectively. The crystallized phase was verified by X-ray diffraction measurements, occurring structural defects were characterized, and the growth conditions were studied being determined the better parameters to growth good-quality single crystals with uniform pale yellow coloration. Optical band gap of 3.1eV was determined from the optical transmission spectrum. •Single crystals of Bi2TeO5 were grown for the first time by a double crucible technique.•The technique was effective to suppress the drawbacks of TeO2 partial evaporation.•Crystalline samples homogeneous and free of macroscopic defects were obtained.