High tunable dielectric response of Pb0.87Ba0.1La0.02(Zr0.6Sn0.33Ti0.07)O3 thin film

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 degrees C rather than at 40 degrees C as observed in the bulk ceramics with the same composition. Measurements of permittivity versus electric field (E) present two maximums at 60 kV cm(-1) (polarizing) and 25 kV cm(-1) (depolarizing), corresponding to antiferroelectric-ferroelectric and ferroelectric-antiferroelectric phase transitions, respectively. Calculations of tunability and figure-of-merit display a maximum value of 75% at E=350 kV cm(-1) and similar to 141, respectively. These high tunable dielectric responses imply that PBLZST thin films can be an attractive material for tunable device applications. (C) 2010 American Institute of Physics. [doi:10.1063/1.3466754]