Bardelli, F and Meneghini, C and Mobilio, S and Ray, Sugata and Sarma, DD (2005) Local structure of Sr(2)FeMoxW1-xO(6) double perovskites studied by EXAFS. In: Physica Scripta, T115 . pp. 457-458.
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Sr2FeMoO6 double perovskits display low field MR at a relatively high temperature and unusual ferromagnetic properties. These compounds depicts metal to insulator transition increasing x above x(c) similar to 0.25. A comparative analysis of the near edge regions (XANES) suggests that iron is Fe3+ in the metallic range. Checking the end compounds, we found that the doped samples can be viewn as inhomogeneous distributions of the end compounds. This could help to distinguish between the two scenarios proposed to explain the metal to insulator transition. Moreover, the local atomic structure of Sr2FeMoxW1-xO6 as a function of composition (0 <= x <= 1) has been investigated by Extended X-ray absorption spectroscopy (EXAFS) a the Fe, Mo, Sr K-edges andW L-III-edge.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to Royal Swedish Academy of Science.|
|Department/Centre:||Division of Chemical Sciences > Solid State & Structural Chemistry Unit|
|Date Deposited:||04 Jun 2010 09:49|
|Last Modified:||19 Sep 2010 06:01|
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