The permittivity maximum of a sol-gel derived Pb 0.87 Ba 0.1 La 0.02 (Zr 0.6 Sn 0.33 Ti 0.07 ) O 3 (PBLZST) thin film was observed to appear at T m =70 ºC rather than at 40 ºC as observed in the bulk ceramics with the same composition. Measurements of permittivity vs. electric field (E) present two maximums at 60 (polarizing) and 25 kVcm -1 (depolarizing), corresponding to antiferroelectric-ferroelectric and ferroelectric-antiferroelectric phase transitions, respectively. Calculations of

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... ity and Figure-of-Merit (FOM) display a maximum value of 75% at E = 350 kV cm -1 and~141, respectively. These high tunable dielectric responses imply that PBLZST thin films can be an attractive material for tunable device applications.