Academic Journal
Ultrafast and Distinct Spin Dynamics in Magnetic Alloys
| العنوان: | Ultrafast and Distinct Spin Dynamics in Magnetic Alloys |
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| المؤلفون: | Radu, Iuliana P., Stamm, Christian, id_orcid:0 000-0001-5611-9084, Eschenlohr, Andrea, Radu, Florin, Abrudan, Radu Marius, Vahaplar, Kadir, Kachel, Torsten, Pontius, Niko, Mitzner, Rolf, Holldack, Karsten, Föhlisch, Alexander, Ostler, Thomas A., Mentink, Johan H., Evans, Richard F.L., Chantrell, Roy, Tsukamoto, Arata, Itoh, Akiyoshi, Kirilyuk, Andrei I., Kimel, Alexey V., Rasing, Theo |
| المصدر: | SPIN, 5 (3) |
| بيانات النشر: | World Scientific |
| سنة النشر: | 2015 |
| المجموعة: | ETH Zürich Research Collection |
| مصطلحات موضوعية: | Ultrafast spin dynamics, Element-specific magnetization, Atomistic spin simulations |
| الوصف: | Controlling magnetic order on ultrashort timescales is crucial for engineering the next-generation magnetic devices that combine ultrafast data processing with ultrahigh-density data storage. An appealing scenario in this context is the use of femtosecond (fs) laser pulses as an ultrafast, external stimulus to fully set the orientation and the magnetization magnitude of a spin ensemble. Achieving such control on ultrashort timescales, e.g., comparable to the excitation event itself, remains however a challenge due to the lack of understanding the dynamical behavior of the key parameters governing magnetism: The elemental magnetic moments and the exchange interaction. Here, we investigate the fs laser-induced spin dynamics in a variety of multi-component alloys and reveal a dissimilar dynamics of the constituent magnetic moments on ultrashort timescales. Moreover, we show that such distinct dynamics is a general phenomenon that can be exploited to engineer new magnetic media with tailor-made, optimized dynamic properties. Using phenomenological considerations, atomistic modeling and time-resolved X-ray magnetic circular dichroism (XMCD), we demonstrate demagnetization of the constituent sub-lattices on significantly different timescales that depend on their magnetic moments and the sign of the exchange interaction. These results can be used as a “recipe” for manipulation and control of magnetization dynamics in a large class of magnetic materials. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/application/pdf |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/wos/000381057800004; http://hdl.handle.net/20.500.11850/105600 |
| DOI: | 10.3929/ethz-b-000105600 |
| الاتاحة: | https://hdl.handle.net/20.500.11850/105600 https://doi.org/10.3929/ethz-b-000105600 |
| Rights: | info:eu-repo/semantics/openAccess ; http://creativecommons.org/licenses/by/4.0/ ; Creative Commons Attribution 4.0 International |
| رقم الانضمام: | edsbas.63248855 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3929/ethz-b-000105600 |
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