A high temperature neutron diffraction study of the double perovskite Ba 2154SmMoO 6

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Abstract

Ba 2LnMoO 6 double perovskites have been recently shown to display a wide range of interesting magnetic and structural properties; Ba 2154SmMoO 6 exhibits simultaneous antiferromagnetic order and a Jahn-Teller distortion. Here we report a high temperature neutron diffraction study of Ba 2154SmMoO 6 from 353 to 877 K. The results evidence a tetragonal to cubic phase transition at 423 K. Above this temperature the thermal displacement parameters of the oxygen atoms are modelled anisotropically as a result of a transverse vibration of the bridging oxygen. A smooth increase in the cell parameter a is observed with temperature for Ba 2154SmMoO 6. © 2012 Elsevier Inc. All rights reserved.

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Wallace, T. K., Ritter, C., & McLaughlin, A. C. (2012). A high temperature neutron diffraction study of the double perovskite Ba 2154SmMoO 6. Journal of Solid State Chemistry, 196, 379–383. https://doi.org/10.1016/j.jssc.2012.06.030

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