Spin-caloric transport properties of cobalt nanostructures: spin disorder effects from first principles
| Autor: | Kováčik, Roman, Mavropoulos, Phivos, Wortmann, Daniel, Blügel, Stefan |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 89, 134417 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.89.134417 |
| Popis: | The fundamental aspects of spin-dependent transport processes and their interplay with temperature gradients, as given by the spin Seebeck coefficient, are still largely unexplored and a multitude of contributing factors must be considered. We used density functional theory together with a Monte-Carlo-based statistical method to simulate simple nanostructures, such as Co nanowires and films embedded in a Cu host or in vacuum, and investigated the influence of spin-disorder scattering on electron transport at elevated temperatures. While we show that the spin-dependent scattering of electrons due to temperature induced disorder of the local magnetic moments contributes significantly to the resistance, thermoelectric and spin-caloric transport coefficients, we also conclude that the actual magnitude of these effects cannot be predicted, quantitatively or qualitatively, without such detailed calculations. Comment: 10 pages, 6 figures |
| Databáze: | arXiv |
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