Temperature and Frequency Dependence of Electric Field‐Induced Phase Transitions in PMN–0.32PT |
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| Authors: | Jenny Wooldridge Mark Stewart Carlo Vecchini Markys G Cain Matthias Gutmann Mike Reece |
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| Affiliation: | 1. National Physical Laboratory, , Teddington, Middlesex, TW11 0LW UK;2. ISIS Facility, Rutherford Appleton Laboratory, , Didcot, OX11 0QX UK;3. Queen Mary, University of London, , London, E1 4NS UK |
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| Abstract: | Single crystal (1 ? x)Pb(Mg1/3 Nb2/3)O3–xPbTiO3 PMN–xPT] (x = 0.32) is a relaxor‐ferroelectric material known to exhibit ‘giant’ piezoelectric behavior, with achievable strains in excess of 1% for samples of certain particular crystallographic orientations and chemical compositions close to the morphotropic phase boundary. In this study, we investigate the electric field‐induced structural phase transitions in single crystal PMN–0.32PT with time‐of‐flight neutron diffraction and macroscopic electrical polarization measurements, and show that both the frequency of the applied ac field and the temperature of the sample are critical factors in determining these phase transition fields. |
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