کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1797847 1524805 2016 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Landau model for the multiferroic delafossite antiferromagnets
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Landau model for the multiferroic delafossite antiferromagnets
چکیده انگلیسی


• Symmetry considerations are used to analyze the phase diagrams of the compounds.
• The competition between possible ground states is discussed.
• The field induced transitions between competing states are described.

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 416, 15 October 2016, Pages 15–24
نویسندگان
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