Phase transformation in unpoled bulk Pb (Zn13 Nb23) O3 -8%PbTi O3 single crystals revealed by the fracturing technique

W. S. Chang, L. C. Lim, F. T. Wang, C. S. Tu, P. Yang

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Polished-and-annealed surfaces of bulk Pb (Zn13 Nb23) O3 -PbTi O3 (PZN-PT) single crystals were covered with a deformed layer and, hence, were unsuitable for structural study by means of x-ray diffraction technique. In contrast, fractured surfaces of bulk single crystals were relatively strain-free giving rise to distinctive diffraction patterns. Using the fracturing technique and high-resolution synchrotron x-ray diffraction, the present work shows that unpoled (annealed) PZN-8%PT single crystal undergoes a (MC) -T-C transformation upon heating under zero field condition, where T and C are the tetragonal and cubic phases, respectively. The symbol (MC) indicates an "apparent" type- C monoclinic phase, which in fact may be a rhombohedral phase of complicated domain structures.

Original languageEnglish
Article number074110
JournalJournal of Applied Physics
Issue number7
Publication statusPublished - 2008
Externally publishedYes

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