تقرير
Magnetocaloric effect at the reorientation of the magnetization in ferromagnetic multilayers with perpendicular anisotropy
| العنوان: | Magnetocaloric effect at the reorientation of the magnetization in ferromagnetic multilayers with perpendicular anisotropy |
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| المؤلفون: | Basso, Vittorio, Sasso, Carlo P., LoBue, Martino, Sandeman, Karl G. |
| المصدر: | Journal of Magnetism and Magnetic Materials 597, 171989 (2024) |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Statistical Mechanics |
| الوصف: | We investigate the magnetocaloric effect obtained by the rotation of a magnetic field applied to an exchange-coupled multilayer system composed of two different ferromagnetic (FM) materials. We specifically consider a system in which the two FMs have perpendicular uniaxial anisotropy axes and utilise conditions which yield a reorientation of the total magnetization when compensation between the anisotropies of the two layers occurs. We calculate the consequent entropy change associated with the "artificial" reorientation. By using known parameters from MnBi and Co we predict an entropy change of $\Delta s = 0.34$ Jkg$^{-1}$K$^{-1}$ for perfect coupling. Lastly, we study the behavior of the multilayer under a rotating magnetic field via a micromagnetic model. When the layer thicknesses are of the order of the local domain wall width, the magnetic field-induced entropy change can be obtained with magnetic fields one order of magnitude lower than in the uncoupled case. Comment: 7 pages, 7 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.jmmm.2024.171989 |
| URL الوصول: | http://arxiv.org/abs/2211.11146 |
| رقم الأكسشن: | edsarx.2211.11146 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.jmmm.2024.171989 |
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