Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/43637
Título: | Landau model for the multiferroic delafossite antiferromagnets |
Autor(es): | Ribeiro, José Luís Pires Perez-Mato, J. M. Vieira, L. G. |
Palavras-chave: | Symmetry Phase transitions Ferromagnetism and antiferromagnetism Multiferroics |
Data: | 2016 |
Editora: | Elsevier 1 |
Revista: | Journal of Magnetism and Magnetic Materials |
Citação: | Ribeiro, 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 |
Resumo(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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/43637 |
DOI: | 10.1016/j.jmmm.2016.05.040 |
ISSN: | 0304-8853 |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Magma delafossite.pdf Acesso restrito! | 1,21 MB | Adobe PDF | Ver/Abrir |