http://www.cnr.it/ontology/cnr/individuo/prodotto/ID294369
Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites (Articolo in rivista)
- Type
- Label
- Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites (Articolo in rivista) (literal)
- Anno
- 2013-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1051/epjconf/20134015005 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Natali Sora I.; Caronna T.; Fontana F.; De Julian Fernandez C.; Caneschi A.; Green M.A.; Bonville P. (literal)
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- http://www.scopus.com/inward/record.url?eid=2-s2.0-84879749580&partnerID=q2rCbXpz (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
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- Note
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- INSTM R.U. and Department of Engineering, University of Bergamo, Dalmine, BG, I-24044, Italy; CNR, Istituto di Scienze e Tecnologie Molecolari (ISTM), 20133 Milano, Italy; INSTM R.U. Firenze and Department of Chemistry, University of Florence, I-50019 Sesto Fiorentino, Italy; Center for Neutron Research, NIST, Gaithersburg, MD, United States; Department of Materials Science and Engineering, University of Maryland, College Park, MD20742-2115, United States; CEA, Centre de Saclay, Service de Physique de l'Etat Condensé, 91191 Gif-sur-Yvette, France (literal)
- Titolo
- Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites (literal)
- Abstract
- Orthorhombic lanthanum orthoferrites La0.8Sr0.2Fe1-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. (literal)
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