6533b832fe1ef96bd129aedb
RESEARCH PRODUCT
Mean field behaviour of Sr1−xCaxTiO3
A. AlmeidaM. MaglioneJosé Leonardo RibeiroM. R. Chavessubject
PermittivityMaterials scienceCondensed matter physicsMineralogy02 engineering and technologyDielectricFunction (mathematics)021001 nanoscience & nanotechnologyCondensed Matter Physics01 natural sciencesFerroelectricityElectronic Optical and Magnetic Materialschemistry.chemical_compoundchemistryMean field theory0103 physical sciencesStrontium titanate010306 general physics0210 nano-technologyQuantumdescription
A systematic analysis of the dielectric constant as a function of temperature in SrTiO 3 : Ca crystals with Ca content of 0.0020, 0.0032, 0.0055. 0.0058, and 0.0110 shows that the Barrett parameters are clearly modified by the Ca content. We have found for each Ca concentration the temperature below which the contribution of the Ca induced clusters becomes sizeable. The values obtained for the fitted parameters in the Barrett formula allow us to trace a boundary between the low-temperature quantum paraelectric and ferroelectric regimes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-10-01 | physica status solidi (b) |