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Optical and dielectric studies of gel grown alpha-hopeite single crystal

Mangalam, G and Krishnan, S and Raj, Justin C and Das, Jerome S (2011) Optical and dielectric studies of gel grown alpha-hopeite single crystal. In: Optik, 122 (14). pp. 1296-1300.

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Official URL: http://dx.doi.org/10.1016/j.ijleo.2010.09.001


Single crystals of a-hopeite exhibiting high transparency were grown by single diffusion gel growth technique. Single crystal X-ray diffraction analysis reveals that the crystal belongs to orthorhombic system. The values of several structural and physical parameters have been determined for the grown crystal. The optical absorption study reveals the transparency of the crystal and is noticed in the entire visible region and the cut-off wavelength was found to be 230 nm. The optical band gap found to be at 3.25 eV. The dependence of extinction co-efficient (k) and the refractive index (n) on the wavelength was also shown. The dielectric constant and dielectric loss of the crystal was studied as a function of frequency and temperature. Transport properties of the grown crystal have been studied from the Cole-Cole plot. (C) 2010 Elsevier GmbH. All rights reserved.

Item Type: Journal Article
Publication: Optik
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Optical band gap;Optical constant;Dielectric studies; Polarizability and structural property
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 29 Jul 2011 11:28
Last Modified: 29 Jul 2011 11:28
URI: http://eprints.iisc.ac.in/id/eprint/39617

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