Field-Induced Dielectric Property in Tungsten-Doped Pb(Mg1/3Nb2/3)1-xTixO3 Single Crystal

Author

Wang, F.-T. ; Tu, C.S.

Author_Institution

Fu Jen Catholic Univ., Taipei

fYear

2007

fDate

27-31 May 2007

Firstpage

575

Lastpage

577

Abstract

Dielectric permittivity, electric polarization, and domain structure have been carried out as a function of temperature in a 0.5 mole% WO₃ doped Pb(Mg_1/3Nb_2/3)_0.64Ti_0.36O₃ (PMNT36%) single crystal. Two first-order-type temperature-dependent phase transitions, monoclinic (rhombohedral) rarr monoclinic rarr cubic, were observed near 278 K (248 K) and 442 K (442 K) upon heating (cooling), respectively. "Monoclinic (rhombohedral)" represents that dominant monoclinic domains coexist with a small fraction of rhombohedral domains. Reorientations of monoclinic domains are mainly responsible for the low-temperature step-like dielectric anomaly. This study shows that WO₃ dopent can enhance monoclinic domains whose dynamics plays an important role in temperature-dependent structural transitions.

Keywords

X-ray diffraction; dielectric polarisation; electric domains; ferroelectric materials; ferroelectric transitions; lead compounds; permittivity; tungsten; PbMgO₃NbO₃TiO₃:W; X-ray diffraction; dielectric permittivity; domain structure; electric polarization; field-induced dielectric property; temperature-dependent structural phase transitions; tungsten-doped single crystal; Cooling; Dielectric losses; Dielectric measurements; Ferroelectric materials; Frequency; Heating; Hysteresis; Permittivity measurement; Polarization; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Conference_Location

Nara

ISSN

1099-4734

Print_ISBN

978-1-4244-1334-8

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2007.4393333

Filename

4393333