A comparative study on macroscopic and nanoscale polarization mapping on large area PLD grown PZT thin films
A comparative study on macroscopic and nanoscale polarization mapping on large area PLD grown PZT thin films
复制标题
DOI：
10.1016/j.ceramint.2018.01.098
复制
发表时间：
2018-06
影响因子：
5.2
通讯作者：
M. Rath;E. Varadarajan;V. Natarajan;M. Rao
中科院分区：
文献类型：
--
作者：
M. Rath;E. Varadarajan;V. Natarajan;M. Rao
By optimizing laser raster scanning conditions and controlling PbO evaporation, we have grown high quality large area PbZr. 52 Ti. 48 O 3 (PZT) thin films using custom-built off-axis pulsed laser deposition (PLD) technique. The realization of high quality PZT thin films over a large area with uniform polarization is a challenging task due to the formation of non-ferroelectric or pyrochlore like PbTi 3 O 7 phases at the processing temperature (> 600° C). Our results show the polycrystalline nature of the sample with a uniform chemical surface composition. The macroscopic level of polarization mapping shows excellent saturated PE loops with a narrow variation (6%) of the remnant polarization (2P r) across the large area thin films. A comparative study of macroscopic and nanoscale level of mapping of polarization switching are performed, to demonstrate the existence of stoichiometry ferroelectric PZT thin films over a large area. The achievement of high quality large area PZT thin films with uniform polarization might be used for under-water SONAR devices and in power harvesting.
