High-field properties of PMN-PT single crystals

Author

Luo, Wei-Gen ; Ding, Ai-Li ; Luo, Haosu ; Yin, Zhi-Wen

Author_Institution

Acad. Sinica, Shanghai, China

Volume

2

fYear

1999

fDate

1999

Firstpage

1009

Abstract

Electric properties of relaxor ferroelectric Pb(Mg_1/3Nb _2/3)O₃-PbTiO₃ (PMN-PT) single crystals near the rhombohedral-tetragonal transition under high-field phase boundary were studied. The single crystals in the ⟨001⟩ direction exhibited a remanent polarization of 30 μC/cm², coercive field of 3.5 kV/cm and switchable polarization of 51 μC/cm ² at 9 kV/cm. The polarization-temperature dependence of the crystals indicated a reduction of 5% in the remanent polarization and 3.2% in switchable polarization at 80°C. The remanent polarization decreased to 5 μC/cm² at 146°C (T_m). However the switchable polarization fell to zero at that temperature. A loss of 12% in the polarization was observed in the switching cycles up to 2.5×10⁸ reversals under bipolar pulse of 12 kV/cm. On the other hand, the crystals have a resistivity of 1.6×10⁹ Ω-cm at 100°C and with a electric field of 10 kV/cm. These results are favorable to applications for device design of the PMN-PT crystals

Keywords

dielectric hysteresis; dielectric polarisation; electrical resistivity; ferroelectric materials; high field effects; lead compounds; PMN-PbTiO₃; PbMgO3NbO3-PbTiO3; coercive field; high-field phase boundary; relaxor ferroelectric; remanent polarization; resistivity; single crystals; switchable polarization; temperature dependence; Crystals; Ferroelectric materials; Hysteresis; Laboratories; Polarization; Pulse amplifiers; Pulse measurements; Solids; Temperature measurement; Ultrasonic variables measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE

Conference_Location

Caesars Tahoe, NV

ISSN

1051-0117

Print_ISBN

0-7803-5722-1

Type

conf

DOI

10.1109/ULTSYM.1999.849167

Filename

849167