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Temperature-Dependent Phase Transition in Orthorhombic 011c Pb(Mg1/3Nb2/3) O3-0.35PbTiO3 Single Crystal
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Temperature-Dependent Phase Transition in Orthorhombic 011c Pb(Mg1/3Nb2/3) O3-0.35PbTiO3 Single Crystal
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Journal Article
Temperature-Dependent Phase Transition in Orthorhombic 011c Pb(Mg1/3Nb2/3) O3-0.35PbTiO3 Single Crystal
2014
Overview
Relaxor [011]c PMN-0.35PT single crystal phase transition characteristics are investigated through various methods including variable temperature dielectric properties, X-ray diffraction, bipolar ferroelectric hysteresis loops (P-E) and electric-field-induced strain (S-E) hysteresis loops measurements. The results reveal that two phase transitions exist within the range from room temperature to 250 °C: orthorhombic (O)-tetragonal (T)-cubic (C). The O-to-T and T-to-C phase transition temperatures have been identified as 84 °C and 152 °C, respectively. Diffuseness degree of the T-to-C phase transition for the unpoled single crystal has been calculated to be 1.56, implying an intermediate state between normal and relaxor ferroelectrics. Temperature-dependent remanent polarization (Pr), coercive field (Ec), saturation polarization (Ps), hysteresis loop squareness (Rsq), and longitudinal piezoelectric constant (d* 33) are also explored to learn the details of the phase transitions. Variable temperature unipolar Suni-E hysteresis loops avail additional evidence for the microstructure change in the as-measured single crystal.
Publisher
MDPI AG
