Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 5: Magnetization/Demagnetization Dynamics

MA 5.3: Vortrag

Montag, 20. März 2017, 10:00–10:15, HSZ 401

The role of magnetic anisotropy on spin pumping revealed in epitaxial Fe/NM (Pt, Pd, Au) systems — •Sascha Keller, Laura Mihalceanu, Andres Conca, Matthias R. Schweizer, Jochen Greser, Burkard Hillebrands, and Evangelos Th. Papaioannou — Fachbereich Physik, Technische Universität Kaiserslautern, Erwin-Schrödinger-Str. 56, 67663 Kaiserslautern, Germany

In spintronics, which extends the classical electronics with the spin of electrons as additional degree of freedom, the spin current-to-charge current conversion is an important task for possible interfaces to microelectronic technologies. The spin pumping (SP) and inverse spin Hall effect (ISHE) in bilayers consisting of a ferromagnetic (FM) layer and an attached non-magnetic metal (NM) layer therefore allow for such a conversion. However the role of intrinsic crystalline magnetic anisotropy has not been discussed in the topic of spin pumping, yet. We address this question through bilayers consisting of metallic FM and NM capping layers of high epitaxial quality grown by molecular beam epitaxy (MBE). Due to the use of metallic ferromagnets employing an angular resolved spin pumping measurement setup is crucial to separate spin rectification effects from ISHE. There the external magnetic field is rotated in-plane and the effects can be differentiated due to the different angular dependences of those effects. The epitaxially grown FM/NM interfaces are strongly affecting the spin pumping and rectification effects due to the structural quality of the interface and the intrinsic magnetic anisotropy of the FM. The Carl Zeiss Stiftung is gratefully acknowlegded for financial support.