Neutron-powder-diffraction study of structural and magnetic structure of La0.7Sr0.3Mn1−xTixO3 (x=0, 0.10, 0.20, and 0.30) |
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Authors: | N. Kallel M. Oumezzine H. Vincent |
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Affiliation: | 1. Faculté des Sciences de Monastir, Département de Physique, Laboratoire de Physico- Chimie des Matériaux, BP 22, 5019 Monastir, Tunisie;2. Laboratoire des Matériaux et du Génie Physique, Ecole Nationale Supérieure de Physique de Grenoble, BP 46, 38 402 Saint-Martin d’Hères Cedex, France |
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Abstract: | Neutron-diffraction and magnetic measurements have been used in order to study the structure and magnetic changes of La0.7Sr0.3Mn1−xTixO3 (x=0, 0.10, 0.20, and 0.30) perovskites. Magnetic measurements show that our samples exhibit a ferromagnetic–paramagnetic transition with decreasing temperature. Effects of Ti doping on the magnetic and nuclear structures are studied here by neutron-powder-diffraction for La0.7Sr0.3Mn1−xTixO3 (x=0.10, 0.20, and 0.30). Our analysis indicates that the three representative samples, with x=0.10, 0.20, and 0.30, have a hexagonal system of R3¯c space group, and that the magnetic moments order ferromagnetically into the (1 0 1) crystallographic planes, i.e. the magnetic moments of the Mn ion are in the ac plane, with no component along the b-axis. There is no crystalline structure changes when the Ti doping level increases. |
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Keywords: | Perovskites Mixed oxides Double exchange Super exchange B-site substitution Rietveld analysis of neutron-powder-diffraction data ZFC (zero-field-cooled) and FC (field-cooled) measurement |
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