Pyroelectric study on dipolar alignment in 0.69Pb(Mg 1/3Nb 2/3)O 3-0.31PbTiO 3 single crystals

Liang Zhao, Ming Rong Shen, Wen Wu Cao

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Abstract

Pyroelectric measurements are conducted during zero-field heating in [001], [110] and [111] poled 0.69Pb(Mg 1/3Nb 2/3)O 3-0.31PbTiO 3 single crystals. Compared to the room-temperature-poled samples, the crystals poled by using the field cooling method show broad but well recognizable pyroelectric current peaks near 190°C, which is much higher than the Curie point (126°C) of the crystal. We propose that this peak of the crystals poled by field-cooling above the Curie point is ascribed to the order-disorder transition of the dipoles in polar nano-regions formed at the Burns temperature.

Original languageEnglish (US)
Article number047702
JournalChinese Physics Letters
Volume29
Issue number4
DOIs
StatePublished - Apr 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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