Abstract
Transparent and highly oriented Kx(Sr0.5Ba0.5)1−x/2Nb2O6 (x= 0.2, 0.4) (KSBN) thin films have been synthesized by a chemical solution deposition method. A homogeneous and stable KSBN precursor solution was prepared by controlling the reaction of metallo‐organics. K0.4Sr0.4Ba0.4Nb2O6 (x= 0.4, K0.4SBN50) and K0.2Sr0.45Ba0.45Nb2O6 (x= 0.2, K0.2SBN50) powders and thin films directly crystallized to the tetragonal tungsten bronze phase above 600°C. The thin films were crystallized on MgO(100) and Pt(100)/MgO(100) with c‐axis preferred orientation. Two crystal lattice planes of K0.4SBN50 and K0.2SBN50 were intergrown at an orientation of 18.5° on MgO(100) and Pt(100)/MgO(100). K0.4SBN50 thin film on Pt(100)/MgO(100) showed the typical hysteresis loop (Pr= 22 µC/cm2, Ec= 99 kV/cm at −190°C). The change in remnant polarization with temperature is strongly related to the diffuse phase transition of the epsilon‐T curves.
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