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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|
|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.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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