Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/43637

TitleLandau model for the multiferroic delafossite antiferromagnets
Author(s)Ribeiro, José Luís Pires
Perez-Mato, J. M.
Vieira, L. G.
KeywordsSymmetry
Phase transitions
Ferromagnetism and antiferromagnetism
Multiferroics
Issue date2016
PublisherElsevier
JournalJournal of Magnetism and Magnetic Materials
CitationRibeiro, J. L., Perez-Mato, J. M., & Vieira, L. G. (2016). Landau model for the multiferroic delafossite antiferromagnets. Journal of Magnetism and Magnetic Materials, 416, 15-24. doi: 10.1016/j.jmmm.2016.05.040
Abstract(s)A symmetry based framework is used to describe the complex phase diagrams observed in the multiferroic delafossite compounds. A free energy Landau functional is derived from the analysis of the transformation properties of the most general incommensurate magnetic spin order parameter. A principle of maximal symmetry is invoked and the stability of each of the different higher symmetry phases considered. The competition between different potential ground states is analysed within the scope of a simplified model, which emphasizes the role of the symmetry allowed phase dependent biquadratic couplings. The cross-over between the different competing states is also discussed. The results show that the diverse set of phase diagrams that are experimentally observed in this class of triangular lattice antiferromagnets and, in particular, the stabilization of magnetically induced ferroelectric states, can be well interpreted and described within this integrated phenomenological approximation.
TypeArticle
URIhttp://hdl.handle.net/1822/43637
DOI10.1016/j.jmmm.2016.05.040
ISSN0304-8853
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - FCD - Artigos/Papers (with refereeing)

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