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Type: Artigo de evento
Title: Investigation Of The Local Fe Magnetic Moments At The Grain Boundaries Of The Ca2 Fere O6 Double Perovskite
Author: Azimonte C.
Granado E.
Cezar J.C.
Gopalakrishnan J.
Ramesha K.
Abstract: The local Fe ferromagnetic (FM) moment at the grain boundaries of a ceramic sample of Ca2 FeRe O6 double perovskite was investigated by means of x-ray magnetic circular dichroism spectroscopy at the Fe L2,3 edges and compared to the overall bulk magnetization. We found that, at the grain boundaries, the Fe FM moments at H=5 T are much smaller than expected and that the M×H curve is harder than in the bulk magnetization. These results suggest a larger degree of FeRe antisite disorder at the grain boundaries of this sample, shedding light into the intriguing nonmetallic resistivity behavior despite the reported presence of free carriers. © 2007 American Institute of Physics.
Rights: aberto
Identifier DOI: 10.1063/1.2714317
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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