Landau-Lifshitz theory of the longitudinal spin Seebeck effect.
In: Physical Review B: Condensed Matter & Materials Physics, Jg. 88 (2013-08-08), Heft 6, S. 64408-1- (8S.)
academicJournal
Zugriff:
Thermal-bias-induced spin angular momentum transfer between a paramagnetic metal and ferromagnetic insulator is studied theoretically based on the stochastic Landau-Lifshitz-Gilbert (LLG) phenomenology. Magnons in the ferromagnet establish a nonequilibrium steady state by equilibrating with phonons via bulk Gilbert damping and electrons in the paramagnet via spin pumping, according to the fluctuation-dissipation theorem. Subthermal magnons and the associated spin currents are treated classically, while the appropriate quantum crossover is imposed on high-frequency magnetic fluctuations. We identify several length scales in the ferromagnet, which govern qualitative changes in the dependence of the thermally induced spin current on the magnetic film thickness. [ABSTRACT FROM AUTHOR]
Titel: |
Landau-Lifshitz theory of the longitudinal spin Seebeck effect.
|
---|---|
Autor/in / Beteiligte Person: | Hoffman, Silas ; Sato, Koji ; Tserkovnyak, Yaroslav |
Zeitschrift: | Physical Review B: Condensed Matter & Materials Physics, Jg. 88 (2013-08-08), Heft 6, S. 64408-1- (8S.) |
Veröffentlichung: | 2013 |
Medientyp: | academicJournal |
ISSN: | 1098-0121 (print) |
DOI: | 10.1103/PhysRevB.88.064408 |
Schlagwort: |
|
Sonstiges: |
|