Dramatic effect of thermal expansion mismatch on the structural, dielectric, ferroelectric and pyroelectric properties of low-cost epitaxial PZT films on SrTiO3 and Si†
Abstract
Because of different thermal expansion mismatches between the film and the substrate, either mainly c-oriented or a-oriented tetragonal epitaxial PZT layers are obtained on SrTiO3 or Si (001) substrates, respectively. The resulting large differences in the dielectric, ferroelectric and pyroelectric properties are measured along the out-of-plane direction.