Article ID Journal Published Year Pages File Type
1808500 Physica B: Condensed Matter 2016 6 Pages PDF
Abstract

Ceramic samples La1−2xSr2xMn1−xSbxO3 (x≤0.2) have been studied by X-ray and neutron powder diffraction, magnetization measurements and charge density calculations have also been performed. The compounds are characterized by the rhombohedral structure at room temperature; temperature decrease causes structural transition to the orthorhombic structure. La1−2xSr2xMn1−xSbxO3 ceramics are characterized by homovalent manganese ions and have long range ferromagnetic order which gradually diminishes with the chemical substitution. It is considered that magnetic properties of the compounds are determined by the dominance of ferromagnetic superexchange interactions stabilized in the orbital disordered orthorhombic phase. Significant covalent component of the Mn–O chemical bonds contributes to the long-range ferromagnetic order of the compounds, the covalency of the chemical bonds is assumed to be isotropically distributed over the orthorhombic phase.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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