Abstract
The study investigates the effect of in-situ substrate temperature and argon-oxygen ambient gas pressure of pulsed laser deposition facility on material composition, optical quality and magnetic response of ZnO:Mn thin films. Structural and optical analyses revealed the existence of an optimal in-situ substrate temperature (450°C) at which thin films showed relatively better texture and optical quality with minimum concentration of structural defects. The detailed analysis of Zn 2p3/2 and O 1s core level XPS spectra revealed that the structural disorder was considerably reduced in thin films after being annealed (in-situ) at substrate temperature of 450 °C. Magnetic measurements revealed the stronger p-d hybridization between oxygen 2p and Mn 3d orbitals in ZnO:Mn thin films being annealed in-situ at 450°C under Ar:O2 admixture of 2.5mbar subsequently leading to improved ferromagnetic response.
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