Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 7: SKM-SYST: Spin Caloric Transport (jointly with TT, HL)

MA 7.5: Hauptvortrag

Montag, 14. März 2011, 16:30–17:00, TRE Ma

Evidence of spin polarized heat current acting on magnetization — •Jean-Philippe Ansermet — EPFL, station 3, CH-1015 Lausanne, Switzerland

Nanomagnets of controlled geometry can be formed and contacted electrically by the method of electrodeposition in nanopores. The talk will focus on recent results, where Joule heating was used as a source of heating on a nanoscale. Evidence for thermal spin transfer torque was demonstrated (Haiming Yu, S. Granville, D. P. Yu, J.-Ph. Ansermet, Phys. Rev. Lett. 104, 146601 (2010) ). Heat currents crossing the free layer of an asymmetric spin valve are shown to change its switching field. The data are accounted for with a thermodynamic model for the spin current accompanying heat transport.