Structural, ferroelectric, and pyroelectric properties of highly c‐axis oriented Pb1−xCaxTiO3 thin film grown by radio‐frequency magnetron sputtering

摘要: Thin films of ferroelectric Pb1−xCaxTiO3 (x=0.0–0.4) were formed on MgO, Pt/MgO, SrTiO3, and Pt/SrTiO3 substrates by rf magnetron sputtering. Characterization the x‐ray diffraction, precession, scanning electron microscopy, probe microanalysis showed them to be epitaxially grown with their c‐axis oriented perpendicular substrate. The decrease in Curie temperature Tc increase pyroelectric coefficient dPs/dT an Ca doping successfully explained assuming that ions occupied Pb ion sites. Pyroelectric infrared detectors using Pb0.7Ca0.3TiO3 thin‐film elements gave better performance than PbTiO3 ceramic elements. internal bias field EB fixed polarization PB observed a function both content hysteresis curves as well dielectric constant applied electric field. These phenomena t...