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RESEARCH PRODUCT
Crystal structure and magnetism of the double perovskites A2FeReO6 (A=Ca, Sr, Ba)
Irene BonnGerhard JakobClaudia FelserWolfgang TremelN. AuthW. WesterburgC. Rittersubject
CrystallographyTetragonal crystal systemMaterials scienceCondensed matter physicsTransition temperatureNeutron diffractionCurie temperatureCrystal structureNeutron scatteringCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsPerovskite (structure)Monoclinic crystal systemdescription
Abstract We synthesized a series of double perovskites A 2 FeReO 6 (A=Ca, Sr, Ba) with Curie temperatures above room-temperature. Neutron and X-ray diffraction analysis have been performed in order to determine the structural and (local) magnetic properties of these materials. While Ba 2 FeReO 6 stays cubic over the whole temperature range we examined, the Sr-compound shows a tetragonal distortion of the perovskite structure which does not completely vanish up to about 520 K far above T C . Ca 2 FeReO 6 has a monoclinic unit cell at high temperatures. Below 400 K a phase separation in two monoclinic phases with identical cell volume is observed in neutron scattering.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-05-01 | Journal of Magnetism and Magnetic Materials |