International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006
  • Published Articles: 2572

Full Length Research Paper

Effect of the annealing temperature on the structure and optical properties of Cd1-x MnxTe thin films

S. A. Gad1*, M. Boshta1, A. M. Abo El-Soud1 and Y. A. el-Gendy2
1Department of Solid State Physics, National Research Centre 12311, Dokki, Cairo, Egypt. 2Department of Physics , Faculty of Science, Helwan, Cairo, Egypt.
Email: [email protected]

  •  Accepted: 27 May 2010
  •  Published: 31 July 2010

Abstract

The ternary systems of Cd1-xMnxTe were synthesized by direct fusion technique. Thin films of these compounds were prepared by electron beam gun under vacuum of 10-5 Torr. The structural properties of these compounds in thin film forms were investigated by X-ray diffraction. It was found that materials crystallize in the zinc-blende form. The optical constants (absorption coefficient and band gap) of the thin films were determined by measurements of reflectance and transmittance in the wavelength region from 500 to 2500 nm. Analysis of the optical absorption spectra revealed the existence of one direct energy gaps. The energy gaps increase as the Mn concentration increases and the annealing temperature decreases. It is observed that as the Mn content (x) increases, the conductivity decreases.

 

Key words: Structure, optical properties, dilute magnetic semiconductor, Cd1-xMnxTe thin films.