Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites

Natali Sora, I. and Caronna, T. and Fontana, F. and De Julián Fernández, C. and Caneschi, A. and Green, M.A. and Bonville, P. (2013) Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites. In: EPJ Web of Conferences. (doi:https://doi.org/10.1051/epjconf/20134015005) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

Orthorhombic lanthanum orthoferrites La0.8Sr 0.2Fe1-yCuyO3-w (y = 0 and 0.10) have been studied using X-rays and neutron powder diffraction (XRPD and NPD), magnetization measurements and 57Fe Mössbauer spectroscopy. Rietveld refinements on XRPD and NPD data show that they adopt an orthorhombic ABO3 perovskite symmetry with La/Sr and Fe/Cu atoms randomly distributed on crystal A and B sites, respectively. The magnetic structure at room temperature is antiferromagnetic, with the Fe/Cu magnetic moments aligned along the a axis. Magnetization curves versus temperature show that the compounds exhibit an overall antiferromagnetic and a weak ferromagnetic behaviour in the range 5-298 K. 57Fe Mössbauer spectroscopy measurements indicate that Fe3+ and Fe5+ ions coexist in both compounds, and the relative percentage of Fe5+ is almost the same at 77 and 170 K, rejecting a charge disproportion mechanism. © 2013 Owned by the authors published by EDP Sciences.

Item Type: Conference or workshop item (Paper)
Additional information: Unmapped bibliographic data: C7 - 15005 [EPrints field already has value set] LA - English [Field not mapped to EPrints] J2 - EPJ Web Conf. [Field not mapped to EPrints] AD - INSTM R.U. and Department of Engineering, University of Bergamo, Dalmine, BG, I-24044, Italy [Field not mapped to EPrints] AD - CNR, Istituto di Scienze e Tecnologie Molecolari (ISTM), 20133 Milano, Italy [Field not mapped to EPrints] AD - INSTM R.U. Firenze and Department of Chemistry, University of Florence, I-50019 Sesto Fiorentino, Italy [Field not mapped to EPrints] AD - Center for Neutron Research, NIST, Gaithersburg, MD, United States [Field not mapped to EPrints] AD - Department of Materials Science and Engineering, University of Maryland, College Park, MD20742-2115, United States [Field not mapped to EPrints] AD - CEA, Centre de Saclay, Service de Physique de l'Etat Condensé, 91191 Gif-sur-Yvette, France [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints]
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QD Chemistry > QD478 Solid State Chemistry
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Giles Tarver
Date Deposited: 14 Oct 2015 11:15 UTC
Last Modified: 15 Oct 2015 11:36 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50958 (The current URI for this page, for reference purposes)
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