Structural phase transformations and nanotwin domains in 0.93Pb(Zn 1/3Nb2/3)O3-0.07PbTiO3

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

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By means of combined dielectric permittivity and thermal current density measurements and insitu high-resolution synchrotron x-ray diffraction study, it is shown that the unpoled and poled 0.93Pb(Zn1/3Nb 2/3)O3-0.07PbTiO3 (PZN-7%PT) single crystals undergo a R-(R+RNT+T+TNT)-(T+TNT)-C transformation sequence upon zero-field heating, where R, T and C are rhombohedral, tetragonal and cubic phases, respectively. Rhombohedral (R NT) and tetragonal (TNT) nanotwin domains were detected in the vicinity of the R-T transformation temperature (TR-T) in both the unpoled and poled states. These nanotwins are likely bridging phases which help to alleviate the internal stresses accompanying the phase transformations.

Original languageEnglish
Article number395229
JournalJournal of Physics: Condensed Matter
Issue number39
Publication statusPublished - 1 Oct 2008
Externally publishedYes

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