Coexistence of monoclinic and tetragonal phases in PMN-PT single crystal
E. B. Araujo, C. A. Guarany, K. Yukimitu, J. C. S. Moraes, A. C. Hernandes
Abstract
The purpose of the present work is to report studies on structural phase transition for PMN-xPT single crystal, with melt PbTiO3 composition around the MPB (x = 0.35 mol %), using infrared spectroscopy technique. The study was centered on monitoring the behavior of the stretching-(Nb-O), stretching-(Ti-O) and stretching-(Mg-O) stretching modes as a function of temperature. Singularities observed between 198 and 300 K suggested a possible coexistence between the monoclinic and tetragonal phases, not revealed by others techniques, for PMN-PT composition studied near MPB.
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