EFFECT OF Cr DOPING INTO CdSe HOST NANOSIZE THIN FILMS ON THE STRUCTURAL, OPTICAL AND MAGNETIC PROPERTIES

Different composition of Cd1-xCrxSe (x = 0, 0.02, 0.04, 0.06, 0.08, and 0.10) films were evaporated by electron beam gun. The effect of Cr doping on the structural, optical, and magnetic properties have been investigated. X-ray diffraction studies confirm the formation of wurtzite structure for all Cd1-xCrxSe films The lattice constants are found to be increased with increasing Cr concentration. The crystallite size increases and the lattice strain decreases with the increase in Cr content. The elemental constituents were characterized by energy dispersive X-ray. Both the refractive index and film thickness have been determined using the envelop method suggested by Swanepoel. Optical studies showed a decrease in refractive index and an increase in energy gap with the increase of the Cr doping. Magnetization measurements via vibrating sample magnetometer showed a hysteresis loop and confirmed room temperature ferromagnetism in Cr-doped CdSe films. The change in Optical constants, energy gap, and magnetic properties, which have been deduced can be interpreted in terms of micro structural parameters.