Phase Phase diagrams and physical properties of (111) oriented Pb(Zr1-xTix)O-3 thin films

作者：Qiu, J. H.^*; Chen, Z. H.; Wang, X. Q.; Yuan, N. Y.; Ding, J. N.

来源：Solid State Communications, 2016, 246: 5-11.

DOI：10.1016/j.ssc.2016.07.028

• Ferroelectric thin films
• Phase transition
• Piezoelectric property

Based on the phenomenological Landau-Devonshire theory, the phase diagrams and physical properties of (111) oriented Pb(Zr1-xTix)O-3 thin films are investigated. The "misfit strain-temperature" phase diagrams of (111) oriented thin films are more complex than that of (001) oriented thin films due to the appearance of nonlinear coupling terms in the thermodynamic potential. The monoclinic M-A phase, the triclinic gamma phase, the orthorhombic 0 phase, and the cubic C phase are stable. The compressive misfit strain induces the monoclinic M-A phase, meanwhile the tensile misfit strain is beneficial to make the triclinic gamma phase and the orthorhombic 0 phase stable. The ferroelectric and dielectric properties are calculated which are in great agreement with the experimental measurements. Moreover, the Pb(Zr0.5Ti0.5)O-3 thin films with the Ti composition around the morphotropic phase boundary (MPB) have the large longitudinal dielectric and piezoelectric properties which are in accordance with the other theoretical results. Most importantly, the tensile misfit strain is prone to induce the larger dielectric and piezoelectric properties than that of compressive misfit strain, which may provide the guidance for experimental research.

• 出版日期2016-10
• 单位江苏大学; 常州大学