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Structure and Magnetic Properties of Sr2NaOsO6

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Thakur,  Gohil S.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Jansen,  Martin
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Thakur, G. S., Felser, C., & Jansen, M. (2020). Structure and Magnetic Properties of Sr2NaOsO6. European Journal of Inorganic Chemistry, (42), 3991-3995. doi:10.1002/ejic.202000699.


Cite as: http://hdl.handle.net/21.11116/0000-0007-7B57-E
Abstract
Sr2NaOsO6, an ordered double perovskite, was obtained by solid-state synthesis. The compound crystallizes in a monoclinic cell [P2(1)/n, a = 5.7043(1) angstrom, b = 5.7828(1) angstrom, c = 8.0816(2) angstrom; beta = 90.01(2)degrees] and develops long-range antiferromagnetic order at approximate to 17 K with strong canting generating a tiny spontaneous moment of 0.06 mu(B)/Os ion. A fit of the high temperature susceptibility data according to a modified Curie-Weiss law revealed a small effective paramagnetic moment of 0.7 mu(B)/Os, which underlines the substantial effect of spin-orbit coupling in 5d oxides. A broad instead of a sharp lambda anomaly in specific heat data suggests frustration and strong magnetic disorder at the osmium lattice.