title: Optical and electrical studies of vapour phase grown Cd1-xCoxTe crystals.
abstract: The optical properties of vapour phase grown crystals of diluted magnetic semiconductor (DMS) Cd1-xCoxTe were investigated for x=0.001, 0.003, 0.005, 0.007 and 0.009. The reflectivity spectra exhibited a regular shift in the fundamental absorption edge (E0) with composition x. The reflectivity spectra for the present samples of Cd1-xCoxTe of all compositions exhibit broad bands at 5300 and 11,100cm(-1) due to the transitions of 4A2-->4T1 (F) and 4A2-->4T1 (P), respectively. Temperature dependence of resistivity revealed semiconducting behaviour of the samples. Hot probe test revealed that all the samples exhibited p-type conductivity.
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati, Andhra Pradesh 517502, India. ydreddy64@yahoomail.com
authors.forename: Y Dwarakanadha
authors.initials: YD
authors.lastname: Reddy
authors.forename: B K
authors.initials: BK
authors.lastname: Reddy
authors.forename: D Sreekantha
authors.initials: DS
authors.lastname: Reddy
authors.forename: D R
authors.initials: DR
authors.lastname: Reddy
mesh_terms: D002104:Cadmium / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization; D004583:Electrons; D013057:Spectrum Analysis; D013691:Tellurium / Q000737:chemistry*; D013696:Temperature; D014835:Volatilization; D014961:X-Ray Diffraction
chemical_list: D002104:Cadmium; D003035:Cobalt; D013691:Tellurium