تقرير
Non-equilibrium self-assembly of spin-wave solitons in FePt nanoparticles
| العنوان: | Non-equilibrium self-assembly of spin-wave solitons in FePt nanoparticles |
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| المؤلفون: | Turenne, D., Yaroslavtsev, A., Wang, X., Unikandanuni, V., Vaskivskyi, I., Schneider, M., Jal, E., Carley, R., Mercurio, G., Gort, R., Agarwal, N., Van Kuiken, B., Mercadier, L., Schlappa, J., Guyader, L. Le, Gerasimova, N., Teichmann, M., Lomidze, D., Castoldi, A., Potorochin, D., Mukkattukavil, D., Brock, J., Hagström, N. Z., Reid, A. H., Shen, X., Wang, X. J., Maldonado, P., Kvashnin, Y., Carva, K., Wang, J., Takahashi, Y. K., Fullerton, E. E., Eisebitt, S., Oppeneer, P. M., Molodtsov, S., Scherz, A., Bonetti, S., Iacocca, E., Dürr, H. A. |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | Magnetic nanoparticles such as FePt in the L10-phase are the bedrock of our current data storage technology. As the grains become smaller to keep up with technological demands, the superparamagnetic limit calls for materials with higher magneto-crystalline anisotropy. This in turn reduces the magnetic exchange length to just a few nanometers enabling magnetic structures to be induced within the nanoparticles. Here we describe the existence of spin-wave solitons, dynamic localized bound states of spin-wave excitations, in FePt nanoparticles. We show with time-resolved X-ray diffraction and micromagnetic modeling that spin-wave solitons of sub-10 nm sizes form out of the demagnetized state following femtosecond laser excitation. The measured soliton spin-precession frequency of 0.1 THz positions this system as a platform to develop miniature devices capable of filling the THz gap. Comment: 32 pages, please check the "attachemnts" tab in the pdf file in order to see the movie |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2111.01649 |
| رقم الأكسشن: | edsarx.2111.01649 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |