تقرير
Spin-Wave-Assisted Thermal Reversal of Epitaxial Perpendicular Magnetic Nanodots
العنوان: | Spin-Wave-Assisted Thermal Reversal of Epitaxial Perpendicular Magnetic Nanodots |
---|---|
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 |
كن أول من يترك تعليقا!