Abstract
The Pb0.25Ba0.15Sr0.6TiO3 (PBST) thin films have been deposited on Pt/Ti/SiO2/Si substrates at different temperatures by radio frequency (rf) magnetron sputtering method. The microstructure, surface morphology, dielectric and tunable properties of PBST thin films were investigated as a function of deposition temperature. It’s found that the orientation of PBST thin films was adjusted by deposition temperature. The PBST thin film deposited at room temperature shows (100) preferred orientation and its dielectric constant and tunability are higher than that of PBST thin film deposited at 450 °C. Furthermore, the PBST thin film deposited at room temperature shows lower dielectric loss and leakage current, which makes it exhibit higher FOM of 49.47 for its appropriate tunability of 44.38% and low dielectric loss of 0.00897.
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