UNIGE document Scientific Article
previous document  unige:30946  next document
add to browser collection
Title

Polarization optical, electric and neutron scattering studies of the perovskite lead cobalt tungstate (Pb2CoWO6)
Authors
Brixel, Wolf Dietrich
Werk, Margit
Fischer, Peter
Bührer, Willi
Rivera, Jean-Pierre
Tissot, Paul
Schmid, Hans
Published in Japanese Journal of Applied Physics. 1985, vol. 24, p. 242-244
Abstract Flux-grown single crystals of the elpasolite-like perovskite Pb2CoWO6 were characterized by polarized light microscopy, electric conductivity, ferroelectric polarization, elastic and inelastic neutron scattering, and DSC. A sequence of 4 phases is found: cubic, Fm3m(I) ↔ (at ∼298 K) monoclinic, incommensurate(II) ↔ (at ∼235 K) ferroelectric(III) ↔ (at 9 K) ferromagnetic/ferroelectric(IV). The transitions II/III and I/II are of first order with the respective latent heats: 290 and 840 J/mol Pb2CoWO6. The structure of phase I was refined with the Rietveld system program, using the 306 K neutron diffraction data. In this phase, a soft phonon mode with wave vector q along Σ has been observed, which condenses near the zone boundary point X.
Keywords Crystal lattice dynamics — Heat of transition (of lead cobalt tungstate) — Electric conductivity and conduction — Ferroelectricity (of lead cobalt tungstate perovskite)
Full text
Article (Published version) (1.2 MB) - public document Free access
Structures
Faculté des sciences / Section de chimie et biochimie / Département de chimie minérale, analytique et appliquée
Project FNS: 1984
Citation
(ISO format) 		BRIXEL, Wolf Dietrich et al. Polarization optical, electric and neutron scattering studies of the perovskite lead cobalt tungstate (Pb2CoWO6). In: Japanese Journal of Applied Physics, 1985, vol. 24, p. 242-244. https://archive-ouverte.unige.ch/unige:30946

272 hits

690 downloads

Contact an author

Update request

Update

Deposited on : 2013-11-05

Export document
Format :
Citation style :