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Synthesis,structure and magnetic properties of layered manganate Sr4Mn3−xCrxO10 (x=0, 0.2)
Authors:M. Zaghrioui  F. SchoensteinC. Autret-Lambert  M. Gervais
Affiliation:Laboratoire d’Electrodynamique des Matériaux Avancés, UMR 6157 CNRS – CEA, Université François Rabelais, UFR Sciences et Techniques, Parc Grandmont, 37200 Tours, France
Abstract:The manganates Sr4Mn3−xCrxO10 (x=0 and 0.2) have been synthesized by solid state reaction. Powder X-ray diffraction analysis shows orthorhombic symmetry with space group Cmca for both compounds. The magnetic susceptibility measurements show an antiferromagnetic transition at 192 and 176 K for x=0 and 0.2, respectively. The magnetic susceptibility data were estimated using a model based on spin exchange antiferromagnetic interactions in isolated (Mn4+) trimer; a paramagnetic contribution due to the chromium ions was added in the case of Cr-doped materials.
Keywords:Magnetic susceptibility   Layered manganate   Crystal structure   Cr-doped manganate
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