Regensburg 2016 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 48: Poster Session II

MA 48.38: Poster

Donnerstag, 10. März 2016, 15:00–18:00, Poster B1

Effect of Novel Exchange-Coupling Torque and Spin-Orbit Interaction on Current Induced Domain Wall Motion in Magnetic Nanowires — •Robin Bläsing1,2, See-Hun Yang2, Gernot Güntherodt1,3, and Stuart S. P. Parkin1,21Max Planck Institute for Microstructure Physics, Halle (Saale), D-006120, Germany — 2IBM Almaden Research Center, San Jose, California 95120, USA — 32nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany

Recent discoveries in the field of current induced domain wall motion open new possibilities for novel memory devices like the racetrack memory. Due to a large perpendicular magnetic anisotropy, the magnetization of an ultra-thin magnetic Co/Ni layer is pointing out-of-plane. In combination with the Dzyaloshinskii-Moriya interaction, Néel domain walls are formed which can be driven by a spin Hall current induced e.g. by an adjacent Pt underlayer, resulting in a domain wall velocity of about 400 m/s. In this work, a further improvement is achieved with synthetic antiferromagnetic structures, where two ultra-thin ferromagnetic layers are coupled antiparallel via the Ruderman-Kittel-Kasuya-Yosida exchange interaction. This exchange coupling gives rise to a novel exchange-coupling torque which increases the domain wall velocity up to 750 m/s.

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DPG-Physik > DPG-Verhandlungen > 2016 > Regensburg