Title :
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
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(Mg1/3Nb2/3)0.64Ti0.36O3 (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;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393333
