تقرير
Finite size effects on the ultrafast remagnetization dynamics of FePt
| العنوان: | Finite size effects on the ultrafast remagnetization dynamics of FePt |
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| المؤلفون: | Willig, L., von Reppert, A., Deb, M., Ganss, F., Hellwig, O., Bargheer, M. |
| المصدر: | Phys. Rev. B 100, 224408 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | We investigate the ultrafast magnetization dynamics of FePt in the L10 phase after an optical heating pulse, as used in heat assisted magnetic recording. We compare continuous and nanogranular thin films and emphasize the impact of the finite size on the remagnetization dynamics. The remagnetization speeds up significantly with increasing external magnetic field only for the continuous film, where domain wall motion governs the dynamics. The ultrafast remagnetization dynamics in the continuous film are only dominated by heat transport in the regime of high magnetic fields, whereas the timescale required for cooling is prevalent in the granular film for all magnetic field strengths. These findings highlight the necessary conditions for studying the intrinsic heat transport properties in magnetic materials. Comment: 7 pages, 4 Figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.100.224408 |
| URL الوصول: | http://arxiv.org/abs/1910.01413 |
| رقم الأكسشن: | edsarx.1910.01413 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.100.224408 |
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