View in EDS

Structural and magnetic properties of (La0.70−x Y x )Ba0.30Mn1−x Fe x O3 perovskites simultaneously doped on A and B sites (0.0≤ x ≤0.30)

Saved in:
Bibliographic Details
Title: Structural and magnetic properties of (La0.70−x Y x )Ba0.30Mn1−x Fe x O3 perovskites simultaneously doped on A and B sites (0.0≤ x ≤0.30)
Authors: Kallel, Nabil1 Nabil.Kallel@fsm.rnu.tn, Abdelkhalek, Sonia Ben1, Kallel, Sami1, Peña, Octavio2, Oumezzine, Mohamed1
Source: Journal of Alloys & Compounds. Jul2010, Vol. 501 Issue 1, p30-36. 7p.
Subjects: Perovskite, Polycrystals, Molecular structure, Magnetic crystals, Solid solutions, Rietveld refinement, Spin glasses, X-ray diffraction
Abstract: Abstract: We present the structural and magnetic properties of polycrystalline samples of the solid solution (La0.70−x Y x )Ba0.30Mn1−x Fe x O3 (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 () 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. [Copyright &y& Elsevier]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Abstract: We present the structural and magnetic properties of polycrystalline samples of the solid solution (La0.70−x Y x )Ba0.30Mn1−x Fe x O3 (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 () 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. [Copyright &y& Elsevier]
ISSN:09258388
DOI:10.1016/j.jallcom.2010.04.073