Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 28: Spin Dynamics and Transport: Domain Walls
MA 28.3: Vortrag
Dienstag, 21. März 2017, 14:30–14:45, HSZ 401
Efficient Current Induced Motion of Chiral Domain Walls — Robin Bläing1, •Tianping Ma1, Chirag Garg1,2, Tom Lichtenberg1, See-Hun Yang2, Ilya Kostanovskiy1, and Stuart Parkin1,2 — 1Max Planck Institut of Microstructure Physics, Halle, Germany — 2IBM Almaden Research Center, San Jose, US
Novel three-dimensional memory devices based on magnetic domains in thin film ferromagnets have high potential to solve long-term memory storing problems. One example is the racetrack memory which is based on current-induced motion of the magnetic domains. The driving force is a spin current injected into the ferromagnetic layer from an underlayer via the spin Hall effect. In addition, the Dzyaloshinskii-Moriya interaction plays a major role in order to achieve an efficient motion. We study novel 2D materials to improve the spin Hall efficiency and Dzyaloshinskii-Moriya interaction. Furthermore, for commercial devices the threshold current to efficiently drive magnetic domain walls needs to be lowered and therefore temperature dependent measurements are performed to gain further understanding of this property.