Structural phase transformation and phase boundary/stability studies of field-cooled Pb(Mg1/3Nb2/3O3)-32%PbTiO3 crystals

TL;DR

This study investigates the structural phase transformations and phase boundary behavior of field-cooled PMN-PT crystals, revealing an anomalous increase in the C->T phase boundary with increasing field near the MPB.

Contribution

It provides new insights into phase boundary behavior of PMN-PT crystals under different cooling conditions, especially near the morphotropic phase boundary.

Findings

Observed C->T->MC phase sequence in both FC and ZFC conditions.

Discovered anomalous increase in C->T phase boundary with increasing field near MPB.

Identified common phase boundary characteristics near MPB regardless of phase region width.

Abstract

Structural phase transformations in (001)-oriented (1-x)Pb(Mg1/3Nb2/3O3)-32%PbTiO3 (PMN-x%PT) crystals have been investigated by x-ray diffraction. A C->T->MC sequence was observed in both the field-cooled (FC) and zero-field-cooled (ZFC) conditions. Most interestingly, an anomalous increase in the C->T phase boundary with increasing field has been observed, which is seemingly a common characteristic of crystals whose compositions are in the vicinity of the MPB, irrespective of the width of the T and MC phase regions.