Temperature-pressure phase diagram and ferroelectric properties of BaTiO3 single crystal based on a modified Landau potential

Abstract

Misfit strain dependence of ferroelectric and piezoelectric properties of clamped (001) epitaxial Pb(Zr0.52,Ti0.48)O3 thin films Appl. Phys. Lett. 99, 252904 (2011) Phase transitions in ferroelectric-paraelectric superlattices J. Appl. Phys. 110, 114109 (2011) Dielectric and nonlinear current-voltage characteristics of rare-earth doped CaCu3Ti4O12 ceramics J. Appl. Phys. 110, 094101 (2011) Scanning electro-optic microscopy of ferroelectric domain structure with a near-field fiber probe J. Appl. Phys. 110, 084117 (2011) Ferroelectric domains in epitaxial PbTiO3 films on LaAlO3 substrate investigated by piezoresponse force microscopy and far-infrared reflectance A modified eighth-order Landau potential was proposed for the BaTiO 3 single crystal by taking account into the quantum mechanical effects at low temperature. While all existing thermodynamic potentials for BaTiO 3 fail to accurately describe the pressure dependence of ferroelectric transition temperatures, the temperature and hydrostatic pressure phase diagram constructed using the modified potential shows excellent agreement with experimental measurements by Ishidate, Abe, Takahashi, and Mori ͓Phys. Rev. Lett. 78, 2397 ͑1997͔͒. On the basis of the new proposed Landau potential, we calculated the dielectric coefficients, spontaneous polarizations, temperature-electric field phase diagram, and piezoelectric coefficients, all in good agreement well with existing experimental data.

Nonlinear stress-strain behavior and stress-induced phase transitions in soft Pb(Zr1−xTix)OSeo1, Franzbach2, Koruza3 et al. 2013Phys. Rev. B496261View full textAdd to dashboardCite

“…Previous works have employed a similar technique to determine the electric field-27, 44 and hydrostatic stress-dependent 48 evolution of polarization in perovskite ferroelectrics. Haun et al 49 have provided approximations of the Landau coefficients up to the 6 th order for numerous PZT compositions.…”

Plastic Deformation of BaTiO3Ceramics by High-pressure Torsion and Changes in Phase Transformations, Optical and Dielectric Properties

“…The intensity of tetragonal peaks decreases significantly after HPT processing at large strains (N = 1-5 or γ = 27-137), indicating that a decrease in tetragonality and a transition to the cubic phase could have occurred, consistent with the BTO phase diagram. [16][17][18] Details concerning the BTO Raman spectra were reported elsewhere. [21][22][23][24] These results clearly show that, although substantial pressure is required to trigger the cubic-phase formation, the phase transition is facilitated with straining.…”

“…[9] Moreover, BTO has been widely investigated for its optical properties, [10] photoluminescence (PL), [11,12] photocatalysis, [13] proton conductivity [14] and phase transformations. [15][16][17][18][19][20][21][22][23][24] BTO transforms from a rhombohedral structure to an orthorhombic phase at − 90°C, to a ferroelectric tetragonal phase at 5°C, and to a paraelectric cubic phase at 120°C under ambient pressure. [15][16][17][18] At ambient temperature, it exhibits a tetragonal-to-cubic phase transformation at 2 GPa [15][16][17][18] and it disorders at 5 GPa.…”

“…[15][16][17][18][19][20][21][22][23][24] BTO transforms from a rhombohedral structure to an orthorhombic phase at − 90°C, to a ferroelectric tetragonal phase at 5°C, and to a paraelectric cubic phase at 120°C under ambient pressure. [15][16][17][18] At ambient temperature, it exhibits a tetragonal-to-cubic phase transformation at 2 GPa [15][16][17][18] and it disorders at 5 GPa. [22] It was reported that the cubic phase can be stable or that several phases can coexist at ambient conditions due to the nanosize effect: 3 nm for nanowires, [19] 30-50 nm for nanograins, [23,24] and 5-26 nm for nanoparticles.…”

Challenges and opportunities for multi-functional oxide thin films for voltage tunable radio frequency/microwave components

“…For example, the Landau polynomial as originally applied to ferroelectric barium titanate by Devonshire 188,189 has been elaborated on many times, and several alternative expressions for the free energy have been reported that reproduce experimental data with varying degrees of agreement. [190][191][192][193][194] The situation for ferroelectric solid solutions is more complicated still, because the dependence of the theory parameters on composition must also be explicitly determined. 195,196 Approaches for doing so that utilize analytical parameterization schemes have recently been reported.…”