article · The European Physical Journal Applied Physics
The advancements complex dielectric and impedance properties studies are carried out on relaxor-ferroelectric single crystals such as PMN-PT (lead titanium-lead magnesium niobate) have gained significant interest for their outstanding properties. Three (1– x ) PMN– x PT compositions were employed, where x = 0.35, which corresponds to the composition of the morphotropic phase boundary under normal ferroelectric behavior. An investigation of the dielectric behavior has been done for the three compositions. By examining the polarization evolution for several samples as a function of the applied field and temperature fluctuation, ferroelectric character was analyzed. The influence of temperature has a significant impact on the hysteresis loop. Impedance and complex modulus plots show two despondent semicircles and one flatten semicircle, respectively for (1– x ) PMN– x PT. This is ascribed to the nearly same grain boundaries, capacitance of grain and higher grain boundary resistance than the grain resistance for (1– x ) PMN– x PT. While the nature of Nyquist plot corroborates the attendance of bulk effects.
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DOI: 10.1051/epjap/2023230010
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