Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 18: Spincaloric Transport
(Joint session of MA and TT organized by MA)

TT 18.1: Vortrag

Montag, 7. März 2016, 15:00–15:15, H31

Spectral characteristics of time resolved magnonic spin Seebeck effect [1] — •levan chotorlishvili, seyyed etesami, and jamal berakdar — Institut für Physik, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany

Spin Seebeck effect (SSE) refers to the generation of spin current due to a temperature gradient, in analogy to the conventional Seebek effect. The current work addresses and unvocer the role of subthermal magnons contributions to the SSE in insulating ferromagnets. The finding is in line with recent experiments given in Ref. [2], and points to further interesting experiments and material composition design aiming at enhancing/exploiting SSE. Technically, the spin-current dynamics is treated based on the Landau-Lifshitz-Gilbert (LLG) equation, while the formation of the time dependent thermal gradient being described self-consistently via the heat equation coupled to the magnetization dynamics. [3]

[1] S. R. Etesami, L. Chotorlishvili, and J. Berakdar, Appl. Phys. Lett. 107, 132402 (2015). [2] S. R. Boona and J. P. Heremans, Phys. Rev. B 90, 064421 (2014). [3] N. Roschewsky, M. Schreier, A. Kamra, F. Schade, K. Ganzhorn, S. Meyer, H. Huebl, S. Geprgs, R. Gross, and S. T. B. Goennenwein, Appl. Phys. Lett. 104, 202410 (2014).