Analysis of growth conditions of SmBaCuO thin films

In this paper we analyze the critical temperature of SmBaCuO thin films grown by means of pulsed laser Deposition as a function of the relevant deposition parameters, i.e., the pressure of the reactive oxygen atmosphere and the substrate temperature. We used a Nd-Yag radiation at 532 nm. The films have been deposited either on oriented magnesium oxide (100) or on strontium titanate (100) single crystals. The substrate temperature range spans from 650°C to 800°C and the oxygen pressure is in the range (10-5-4x10-1) mbar. In these ranges of parameters we get metallic behavior of the resistance vs. temperature, with an onset of the critical temperature up to 91 K. XRD characterizations showed the orientation of the c axis normal to the substrate surface.