1. ![](http://irbiscorp.spsl.nsc.ru/webirbis-htdocs/images/printer.jpg)
|
Lattice dynamics and ferroelectric instability in ordered and disordered PbSc1/2Ta1/2O3 and PbSc1/2Nb1/2O3 solid solutions / V. I. Zinenko [et al.]> // J. Exp. Theor. Phys. - 2007. - Vol. 105, Is. 3. - P. 617-625, DOI 10.1134/S1063776107090191. - Cited References: 23
. - ISSN 1063-7761РУБ Physics, Multidisciplinary Рубрики: RELAXOR FERROELECTRICS PHASE-TRANSITION LOCAL-STRUCTURE PB(SC1/2NB1/2)O-3 PEROVSKITE CRYSTALS Кл.слова (ненормированные): Dipole moment -- Lattice vibrations -- Negative ions -- Phonons -- Positive ions -- Solid solutions -- Dynamic Born charges -- Ferroelectric instabilities -- Frequency spectra -- Gordon-Kim models -- Oxygen anions -- Phonon spectra -- Ferroelectricity Аннотация: The dynamic Born charges and the frequency spectra of lattice oscillations in the crystals of ordered and disordered PbSc1/2Ta1/2O3 (PST) and PbSc1/2Nb1/2O3 (PSN) solid solutions have been calculated within the framework of the generalized Gordon-Kim model with allowance for the dipole and quadrupole polarizabilities. The phonon spectra of both compounds contain ferroelectric soft modes. The influence of various interactions on the magnitude of dynamic charges and ferroelectric instability in PSN and PST solid solutions has been studied and it is shown that both these charges and the ferroelectric instability are determined by the competition between long-range dipole-dipole interactions and short-range dipole-charge interactions, the determining role played by the interaction of Nb (Ta) cations and oxygen anions in the Nb-O (Ta-O) bond direction.
WOS, Scopus, Читать в сети ИФ Держатели документа: Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia Russian Acad Sci, PN Lebedev Phys Inst, Moscow 119991, Russia ИФ СО РАН Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation Lebedev Physical Institute, Russian Academy of Sciences, Moscow 119991, Russian Federation Доп.точки доступа: Zinenko, V. I.; Зиненко, Виктор Иванович; Zamkova, N. G.; Замкова, Наталья Геннадьевна; Maksimov, E. G.; Sofronova, S. N.; Софронова, Светлана Николаевна } Найти похожие
|