Azimonte, C and Granado, E and Cezar, JC and Gopalakrishnan, J and Ramesha, K (2007) Investigation of the local Fe magnetic moments at the grain boundaries of the Ca2FeReO6 double perovskite. In: 10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference, JAN 07-11, 2007, Baltimore.
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The local Fe ferromagnetic (FM) moment at the grain boundaries of a ceramic sample of Ca2FeReO6 double perovskite was investigated by means of x-ray magnetic circular dichroism spectroscopy at the Fe L-2,L-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 MxH curve is harder than in the bulk magnetization. These results suggest a larger degree of Fe/Re antisite disorder at the grain boundaries of this sample, shedding light into the intriguing nonmetallic resistivity behavior despite the reported presence of free carriers. (c) 2007 American Institute of Physics.
|Item Type:||Conference Paper|
|Additional Information:||Copyright of this article belongs to American Institute of Physics.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||30 Mar 2010 12:08|
|Last Modified:||19 Sep 2010 05:57|
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