Pyroelectric Study on Dipolar Alignment in 0.69Pb(Mg1/3Nb2/3)O3−0.31PbTiO3 Single Crystals
ZHAO Liang 1,SHEN Ming-Rong1*,CAO Wen-Wu2
1Jiangsu Key Laboratory of Thin Films and Department of Physics, Soochow University, Suzhou 215006 2Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
Pyroelectric Study on Dipolar Alignment in 0.69Pb(Mg1/3Nb2/3)O3−0.31PbTiO3 Single Crystals
ZHAO Liang 1,SHEN Ming-Rong1*,CAO Wen-Wu2
1Jiangsu Key Laboratory of Thin Films and Department of Physics, Soochow University, Suzhou 215006 2Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
摘要Pyroelectric measurements are conducted during zero-field heating in [001], [110] and [111] poled 0.69Pb(Mg1/3 Nb2/3)O3−0.31PbTiO3 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.
Abstract：Pyroelectric measurements are conducted during zero-field heating in [001], [110] and [111] poled 0.69Pb(Mg1/3 Nb2/3)O3−0.31PbTiO3 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.
ZHAO Liang,SHEN Ming-Rong*,CAO Wen-Wu. Pyroelectric Study on Dipolar Alignment in 0.69Pb(Mg1/3Nb2/3)O3−0.31PbTiO3 Single Crystals[J]. 中国物理快报, 2012, 29(4): 47702-047702.
ZHAO Liang,SHEN Ming-Rong*,CAO Wen-Wu. Pyroelectric Study on Dipolar Alignment in 0.69Pb(Mg1/3Nb2/3)O3−0.31PbTiO3 Single Crystals. Chin. Phys. Lett., 2012, 29(4): 47702-047702.
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