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Crystallographic and magnetic structure of the Sr2MnReO6 double perovskite

The crystal and magnetic structure of the ordered double perovskite Sr2MnReO6 was investigated by neutron diffraction. Monoclinic (space group P 21/n) distortion of the parent cubic double perovskite structure was revealed, and the refined Mn–O–Re bond angles deviate significantly from 180°. The monoclinic distortion produces antisymmetric exchange interactions, leading to a canted magnetic structure, for which a possible model is proposed and refined. No structural transitions were observed upon cooling or in an external magnetic field. Complementary x-ray synchrotron diffraction data support the neutron diffraction findings.