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Nature of ``Disorder'' in the Ordered Double Perovskite Sr2FeMoO6

Meneghini, C and Ray, Sugata and Liscio, F and Bardelli, F and Mobilio, S and Sarma, DD (2009) Nature of ``Disorder'' in the Ordered Double Perovskite Sr2FeMoO6. In: Physical Review Letters, 103 (4). pp. 1-4.

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The degree of B/B alternate cation order is known to heavily influence the magnetic properties of A2BB O6 double perovskites although the nature of such disorder has never been critically studied. Our detailed x-ray absorption fine structure studies in conjunction with synchrotron radiation x-ray diffraction experiments on polycrystalline Sr2FeMoO6 samples with various degrees of disorder reveal that a very high degree of short range order is preserved even in samples with highly reduced long range chemical order. Based on these experimental results and with the help of detailed structural simulations, we are able to model the nature of the disorder in this important class of materials and discuss the consequent implications on its physical properties.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: American physical society
Additional Information: copyright of this article belongs to American physical society.
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited: 23 Dec 2009 09:02
Last Modified: 19 Sep 2010 05:41
URI: http://eprints.iisc.ac.in/id/eprint/22257

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