Structural and magnetic properties of (La0.70−xYx)Ba0.30Mn1−xFexO3 perovskites simultaneously doped on A and B sites (0.0 ≤ x ≤ 0.30) - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Alloys and Compounds Année : 2010

Structural and magnetic properties of (La0.70−xYx)Ba0.30Mn1−xFexO3 perovskites simultaneously doped on A and B sites (0.0 ≤ x ≤ 0.30)

Nabil Kallel
  • Fonction : Auteur
Sonia Ben Abdelkhalek
  • Fonction : Auteur
Sami Kallel
  • Fonction : Auteur
Mohamed Oumezzine
  • Fonction : Auteur

Résumé

We present the structural and magnetic properties of polycrystalline samples of the solid solution (La0.70−xYx)Ba0.30Mn1−xFexO3 (x = 0.00, 0.10, 0.20 and 0.30). Samples have been prepared by a conventional solid-state reaction method in air. Rietveld refinements of the X-ray powder diffraction data show a structural transition from rhombohedral (View the MathML sourceR3¯c) to orthorhombic (Pbnm) symmetry when x ≥ 0.10. The ZFC, FC and M(H) measurements lead to conclude that the samples with x ≥ 0.10 behave like spin-glass systems. The substitution of Mn3+ ions by Fe3+ ions triggers antiferromagnetic interactions between the Fe3+ and Mn4+ spins. The values of the magnetization (M(H)) decrease when increasing the Fe content. On the basis of a simple model of Mn and Fe spins pointing in opposite directions, we found the experimental data close to the calculated values, confirming the antiferromagnetic alignment between Fe and Mn moments.

Dates et versions

hal-00829605 , version 1 (03-06-2013)

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Nabil Kallel, Sonia Ben Abdelkhalek, Sami Kallel, Octavio Peña, Mohamed Oumezzine. Structural and magnetic properties of (La0.70−xYx)Ba0.30Mn1−xFexO3 perovskites simultaneously doped on A and B sites (0.0 ≤ x ≤ 0.30). Journal of Alloys and Compounds, 2010, 501 (1), pp.30-36. ⟨10.1016/j.jallcom.2010.04.073⟩. ⟨hal-00829605⟩
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