  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.
