کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8153366 1524766 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability and phase transition of skyrmion crystals generated by Dzyaloshinskii-Moriya interaction
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Stability and phase transition of skyrmion crystals generated by Dzyaloshinskii-Moriya interaction
چکیده انگلیسی
We generate a crystal of skyrmions in two dimensions using a Heisenberg Hamiltonian including the ferromagnetic interaction J, the Dzyaloshinskii-Moriya interaction D, and an applied magnetic field H. The ground state (GS) is determined by minimizing the interaction energy. We show that the GS is a skyrmion crystal in a region of (D,H). The stability of this skyrmion crystalline phase at finite temperatures is shown by a study of the time-dependence of the order parameter using Monte Carlo simulations. We observe that the relaxation is very slow and follows a stretched exponential law. The skyrmion crystal phase is shown to undergo a transition to the paramagnetic state at a finite temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 455, 1 June 2018, Pages 32-38
نویسندگان
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