Stabilization of the perovskite phase in PMN-PT epitaxial thin films via increased interface roughness

Non-stoichiometry and its implications for the properties of PMN–PT thin films

“…On some substrates [13] or buffer layers [22], perfectly single-phase PMN-PT cannot be grown from stoichiometric targets. As it has been shown [10,[22][23][24], the phase stability strongly depends on the morphology of the substrate surface. Additionally, the accuracy of the phase composition analysis is restricted by the detection limit of the technique, which is most commonly X-ray diffraction.…”

Growth mode and strain effect on relaxor ferroelectric domains in epitaxial 0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3/SrRuO3 heterostructures

“…The exact origin of the giant piezoelectric response in PMN-PT is still under debate due to the high complexity of the microstructure and the local polar order/disorder at the MPB. [10][11][12][13][14][15] Despite the great attention received by PMN-PT in thin lm form, in particular for energy harvesting, energy storage and cooling applications, [16][17][18][19][20][21] there is still a lack of knowledge regarding epitaxial thin lms, particularly concerning correlations between the local atomic structure/strain and physical properties. 10,[22][23][24][25][26][27] Thus, understanding of the domains in relaxor ferroelectric thin lms and their evolution under external parameters such as epitaxial strain is crucial for practical applications.…”

“…16,21,[36][37][38] Recently, by examining the chemical composition of epitaxial PMN-33PT lms, Gabor et al reported that the lms prepared from targets with PbO excess exhibit a deciency in magnesium concentration. 21 The magnesium decit was believed to maintain the macroscopic electroneutrality, otherwise violated by the surplus of lead. We should note that the loss of magnesium at high temperatures due to the reevaporation from lms was also reported.…”

Comparison of Metal-Based PZT and PMN–PT Energy Harvesters Fabricated by Aerosol Deposition Method

“…Their results showed that the single-crystalline PMN–PT film had a higher figure of merit (FOM) for actuators and energy harvesters than other commercial piezoelectric materials. Although single-crystalline PMN–PT has a potential application in EH, the fabrication technology remains expensive and difficult to realize at the industrial production level [ 22 , 23 ]. In contrast, the aerosol deposition method (ADM) is more productive and demonstrates multi-product variability [ 24 , 25 ].…”