تقرير
Spin-Wave-Assisted Thermal Reversal of Epitaxial Perpendicular Magnetic Nanodots
| العنوان: | Spin-Wave-Assisted Thermal Reversal of Epitaxial Perpendicular Magnetic Nanodots |
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| المؤلفون: | Rohart, S., Campiglio, P., Repain, V., Nahas, Y., Chacon, C., Girard, Y., Lagoute, J., Thiaville, A., Rousset, S. |
| المصدر: | Phys. Rev. Lett. 104, 137202 (2010) |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | The magnetic susceptibility of self-organized two-dimensional Co nanodots on Au(111) has been measured as a function of their size in the 2-7~nm diameter range. We show that the activation energy for the thermal reversal displays a power law behavior with the dot volume. Atomic scale simulations based on the Heisenberg hamiltonian show that this behavior is due to a deviation from the macrospin model for dot size as small as 3~nm in diameter. This discrepancy is attributed to finite temperature effects through the thermal excitation of spin-wave modes inside the particles Comment: 4 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.104.137202 |
| URL الوصول: | http://arxiv.org/abs/2402.04903 |
| رقم الأكسشن: | edsarx.2402.04903 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.104.137202 |
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