Effect of Sr substitution on tunability and dielectric properties in Pb(Zr0.50Ti0.50)O3 thin films fabricated by chemical solution deposition

(Pb
_1-x
Sr
_x
)(Zr
_0.5
Ti
_0.5
)O
₃
( x= 0 to 0.65) thin films were grown on Pt/TiO
₂
/SiO
₂
/Si substrates by chemical solution deposition. Films were crystallized in the single phase perovskite structure in the temperature range ( 550-700°C). Dielectric constant and loss tangent at room temperature reduced as the percentage of Sr substitution increased at the A-site of this perovskite structure. The phase transition temperature (Tc) lowered with Sr-substitution and Tc below the room temperature was obtained for composition with Sr ≥ 40%. The room temperature tunability reduced with Sr substitution, however, the k-factor slightly improved.