Spin glass-like behaviour in Fe-rich phases of Sr2Fe1−xMnxMoO6 (0.1≤x≤0.4)
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Asok Poddara and Chandan Mazumdar
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Received 8 March 2010;
revised 31 March 2010;
accepted 2 April 2010.
Available online 24 April 2010.
Abstract
Below their respective ferromagnetic Curie temperatures (TC), Sr2Fe1−xMnxMoO6 (0.1≤x≤0.4) undergo a spin glass-like transition owing to the electronic phase segregation process that creates highly spin disordered regions. At low temperatures, an additional short range magnetic interaction is observed due to large differences in volumes of FeO6 and MnO6 octahedra. The magnetoelastic structural change is also reflected in the lattice parameters.
Keywords: Transition-metal compounds; Magnetic impurity interactions; Spin glasses and other random magnets
