Spectral characteristics of time resolved magnonic spin Seebeck effect
| Autor: | Jamal Berakdar, S. R. Etesami, Levan Chotorlishvili |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Condensed Matter - Materials Science Magnetization dynamics Condensed Matter - Mesoscale and Nanoscale Physics Physics and Astronomy (miscellaneous) Spintronics Condensed matter physics Magnon Yttrium iron garnet Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences Magnetization Temperature gradient chemistry.chemical_compound Condensed Matter::Materials Science chemistry Thermoelectric effect Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Heat equation |
| DOI: | 10.48550/arxiv.1509.04018 |
| Popis: | Spin Seebeck effect (SSE) holds promise for new spintronic devices with low-energy consumption. The underlying physics, essential for a further progress, is yet to be fully clarified. This study of the time resolved longitudinal SSE in the magnetic insulator yttrium iron garnet (YIG) concludes that a substantial contribution to the spin current stems from small wave-vector subthermal exchange magnons. Our finding is in line with the recent experiment by S. R. Boona and J. P. Heremans, Phys. Rev. B 90, 064421 (2014). Technically, the spin-current dynamics is treated based on the Landau-Lifshitz-Gilbert (LLG) equation also including magnons back-action on thermal bath, while the formation of the time dependent thermal gradient is described self-consistently via the heat equation coupled to the magnetization dynamics Comment: 5 pages, 5 figures |
| Databáze: | OpenAIRE |
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