Synthesis, characterization and studies on magnetic and electrical properties of LaAlyFe1-yO3 nanomultiferroic

Citation:
Ahmed, M. A., N. Okasha, and B. Hussein, "Synthesis, characterization and studies on magnetic and electrical properties of LaAlyFe1-yO3 nanomultiferroic", Journal of Alloys and Compounds, vol. 553, pp. 308 - 315, 2013.

Abstract:

Multiferroic LaAlyFe1-yO3; 0.00 ≤ y ≤ 0.20 were successfully synthesized using citrate autocombustion method and their properties were systematically studied. All the samples were crystallized in a perovskite structure. The evaluation of the unit-cell parameters by X-ray diffraction technique revealed that the lattice constants and volume of the unit cell decreased along with increase of Al content, while the Fe-O octahedra became less distorted. The Goldschmidt tolerance factor for the perovskite increases from 0.905 for LaFeO3 to 0.914 for LaAl 0.2Fe0.8O3 confirming that the crystal structure is orthorhombic. All the magnetic parameters such as μeff, χM, and magnetization (MRT) decrease as Al content increases, while Néel temperature indicates the highest value (834 K) at y = 0.1. The magnetic measurements revealed that it has a superparamagnetic behavior with coercive field Hc nearly zero. Dielectric and activation energy results agree well with the other measurements. © 2012 Elsevier B.V. All rights reserved.

Notes:

Cited By (since 1996):1Export Date: 11 February 2014Source: ScopusCODEN: JALCELanguage of Original Document: EnglishCorrespondence Address: Ahmed, M.A.; Physics Department, Faculty of Science, Cairo University, Giza, Egypt; email: moala47@hotmail.com

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