Dresden 2020 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 53: Magnonics II

MA 53.2: Vortrag

Donnerstag, 19. März 2020, 15:15–15:30, HSZ 401

Spin transport through insulating multilayers — •Verena Brehm1, Ulrike Ritzmann2, Martin Evers1, and Ulrich Nowak11University of Konstanz, D-78457 Konstanz — 2Freie Universität Berlin, D-14195 Berlin

Spin transport in magnetic insulators allows transport without Joule heating. Furthermore, many magnetic insulators are oxides with exceptionally low damping, giving rise to energy efficient transport for future spin-wave based technology. The design of spin-transport based devices such as transistors or spin valves often requires multilayer systems composed of different magnetic materials [1]. Thus, the understanding of the behavior of a spin current propagating across interfaces is crucial.

We study spin transport in two and three layer systems composed of ferro- and antiferromagnets within a classical atomistic spin model numerically. The focus of this talk is on the transmission of a spin current across the interfaces depending on the magnon frequency and on the interface and bulk properties. Furthermore, we investigate the temperature dependence of this transport, in particular for structures where the critical temperature varies significantly between the layers. This allows to study spin transport in the vicinity of the critical temperature, as demonstrated in recent experiments [2].
[1] Cramer et al.: Nat. Commun. 9, 1089 (2018)
[2] Schlitz et al.: Appl. Phys. Lett. 112, 132401 (2018)

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