Azimonte, C. ; Granado, E. ; Cezar, J. C. ; Gopalakrishnan, J. ; Ramesha, K. (2007) Investigation of the local Fe magnetic moments at the grain boundaries of the Ca2FeReO6 double perovskite Journal of Applied Physics, 101 (9). 09H115_1-09H115_3. ISSN 0021-8979
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Official URL: http://jap.aip.org/resource/1/japiau/v101/i9/p09H1...
Related URL: http://dx.doi.org/10.1063/1.2714317
Abstract
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 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 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.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Institute of Physics. |
| Keywords: | Calcium Compounds; Iron Compounds; Ferromagnetic Materials; Magnetic Moments; Grain Boundaries; Magnetic Circular Dichroism; Magnetisation; Antisite Defects |
| ID Code: | 84284 |
| Deposited On: | 24 Feb 2012 15:35 |
| Last Modified: | 24 Feb 2012 15:35 |
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