Sol-Gel Derived La0.7Sr0.3MnO3 Thin Films by Pulsed Laser Deposition

La0.7Sr0.3MnO3 （LSM） nancomposite was synthesized using sol gel method at 600℃. The structure and elemental analysis were confirmed by X-ray diffraction （XRD） and energy dispersive X-Ray （EDX） respectively with rhombohedral crystal structure. High resolution transmission electron microscope （HR-TEM） imaging showed that the prepared LSM has uniform shape with particle sizes ranging between 5 and 95 nm, and lattice fringes also displayed the rhomobhedral structure. Thin films of LSM with 97 nm were deposited on clean Si （100） single crystal substrate by PLD using Nd：YAG （1,064 nm） with 10 Hz repetition rate and 6 ns pulse duration at room temperature in high vacuum of-6 × 10^-6 torr. LSM films were annealed at temperatures of 400, 600, 800 and 1,000℃ for 2 h. The XRD indicated that crystallization is enhanced by increasing annealing temperature. Additionally, grain size was increased by rising annealing temperature as indicated from field emission scanning electron microscope （FESEM） imaging. The average roughn