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Temperature effect on the electrical properties of chromium oxide (Cr2O3) thin films

MD. JULKARNAIN1, J. HOSSAIN1, K. S. SHARIF1, K. A. KHAN1,*

Affiliation

  1. Department of Applied Physics and Electronic Engineering, University of Rajshahi, Rajshahi-6205, Bangladesh

Abstract

Chromium Oxide (Cr2O3) thin films have been prepared by thermal evaporation onto glass substrate at a pressure of about 6×10-4 Pa. Structural and compositional analysis has been carried out by XRD, SEM and EDAX method. The heating and cooling cycles of the samples are reversible in the investigated temperature range after successive heat-treatment in air. Temperature dependence of electrical conductivity shows a semiconducting behavior. The thickness dependence of conductivity is well in conformity with the Fuchs-Sondheimar theory. The Hall coefficient shows a positive sign exhibiting ptype carriers. Optical study has been employed to determine the band gap of the samples..

Keywords

Thermal evaporation, Chromium Oxide, Thin films, Electrical properties, Optical properties.

Submitted at: Oct. 7, 2010
Accepted at: May 25, 2011

Citation

MD. JULKARNAIN, J. HOSSAIN, K. S. SHARIF, K. A. KHAN, Temperature effect on the electrical properties of chromium oxide (Cr2O3) thin films, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 5, pp. 485-490 (2011)