Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.39: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Spin current in a ferromagnetic chain — •Seyyed Ruhollah Etesami1,2, Levan Chotorlishvili2, Alexander Sukhov2, and Jamal Berakdar2 — 1Max Planck Institute of Microstructure Physics, Halle, Germany — 2Martin Luther University Halle-Wittenberg, Halle, Germany
The long-range thermal injection of the spin current from a ferromagnet (FM) to the adjacent normal metal (NM), known as spin Seebeck effect (SSE), has paved the way for developing more efficient thermoelectric devices. Since the FM-NM interface plays the key role in SSE, the focus of the studies mainly is on the FM-NM interface and the ferromagnet is modeled just as a single domain. But in order to understand SSE the knowledge of spin current generated in the ferromagnet is also indispensable, although it's not yet well understood. In this study we were interested to turn our focus on the generated spin current in the ferromagnet part. We modeled ferromagnet part as a chain of magnetic moments under a temperature gradient. We used the stochastic Landau-Lifshitz-Gilbert (LLG) equation to describe the dynamic of the ferromagnet chain. The generated spin current along the chain at different circumstances was studied. Finally,the FM-NM interface effect was studied by adding the spin pumping and spin-transfer torques to the LLG equation.