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Non-collinear magnetic structure of manganese quadruple perovskite CdMn7O12

MPG-Autoren
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Guo,  H.
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Komarek,  A. C.
Alexander Komarek, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Guo, H., Fernandez-Daz, M. T., Zhou, L., Yin, Y., Long, Y., & Komarek, A. C. (2017). Non-collinear magnetic structure of manganese quadruple perovskite CdMn7O12. Scientific Reports, 7: 45939, pp. 1-9. doi:10.1038/srep45939.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002D-2DEB-B
Zusammenfassung
We report on the magnetic structure of CdMn7O12 determined by powder neutron diffraction. We were able to measure the magnetic structure of this Cd containing and highly neutron absorbing material by optimizing the sample geometry and by blending the CdMn7O12 with Aluminum powder. Below its Neel temperature TN1 all magnetic reflections can be indexed by a single commensurate propagation vector k = (0, 0, 1). This is different to the case of CaMn7O12 where the propagation vector is incommensurate and where an in-plane helical magnetic structure has been found. We observe a commensurate noncollinear magnetic structure in CdMn7O12 with in-plane aligned magnetic moments resembling the ones in CaMn7O12. However, the commensurate propagation vector prevents the appearance of a helical magnetic structure in CdMn7O12. Finally, we also observe a third structural phase transition below similar to 60 K that can be attributed to phase separation.