title: Non-collinear magnetic structure of manganese quadruple perovskite CdMn7O12.
abstract: We report on the magnetic structure of CdMn7O12determined 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 CdMn7O12with Aluminum powder. Below its Néel temperature TN1all magnetic reflections can be indexed by a single commensurate propagation vector k = (0, 0, 1). This is different to the case of CaMn7O12where the propagation vector is incommensurate and where an in-plane helical magnetic structure has been found. We observe a commensurate non-collinear magnetic structure in CdMn7O12with 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 ~60 K that can be attributed to phase separation.
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, Dresden, D-01187, Germany.
authors.forename: H
authors.initials: H
authors.lastname: Guo
authors.affiliation: Institut Laue-Langewin (ILL), 71 avenue des Martyrs, Grenoble Cedex 9, F-38042, France.
authors.forename: M T
authors.initials: MT
authors.lastname: Fernández-Díaz
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box. 603, Beijing, 100190, China.
authors.forename: L
authors.initials: L
authors.lastname: Zhou
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box. 603, Beijing, 100190, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Yin
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box. 603, Beijing, 100190, China. ywlong@iphy.ac.cn.|Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China. ywlong@iphy.ac.cn.
authors.forename: Y
authors.initials: Y
authors.lastname: Long
authors.affiliation: Max-Planck-Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, Dresden, D-01187, Germany. Alexander.Komarek@cpfs.mpg.de.
authors.forename: A C
authors.initials: AC
authors.lastname: Komarek