Structural and magnetic properties of layered perovskite manganite LaCaBiMn2O7
1 Laboratoire de Physico-Chimie des Matériaux Inorganiques, Faculté des Sciences Aïn-Chock, Université Hassan II, BP. 5366 Mâarif, Casablanca, Morocco
2 Laboratoire de Physique des Matériaux, Micro-électronique, Automatique et Thermique, Faculté des Sciences Aïn-Chock, Université Hassan II, BP. 5366 Mâarif, Casablanca, Morocco
3 Institut Néel, CNRS - Université J. Fourier, BP. 166, 38042 Grenoble, France
a e-mail: firstname.lastname@example.org
The layered perovskite oxide, LaCaBiMn2O7, has been prepared by the conventional aqueous solution precipitation method. The powder X-ray diffraction studies suggest that the phase crystallizes with tetragonal unit cell in the space group I4/mmm. The magnetic properties suggest that the ferromagnetic interactions are dominant and manganese ion in the phase is present in mixed valence states Mn3+and Mn4+. The thermomagnetization curve is found to obey the Bloch law. Spin wave stiffness constant D and the approximate value for JMnMnexchange interaction were estimated from the experimental results.
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