Field-free deterministic ultra fast creation of skyrmions by spin orbit torques

Magnetic skyrmions are currently the most promising option to realize current-driven magnetic shift registers. A variety of concepts to create skyrmions were proposed and demonstrated. However, none of the reported experiments show controlled creation of single skyrmions using integrated designs. He...

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Bibliographic Details
Published in:arXiv.org 2017-05
Main Authors: Büttner, Felix, Lemesh, Ivan, Schneider, Michael, Pfau, Bastian, Günther, Christian M, Hessing, Piet, Geilhufe, Jan, Caretta, Lucas, Engel, Dieter, Krüger, Benjamin, Viefhaus, Jens, Eisebitt, Stefan, Beach, Geoffrey S D
Format: Article
Language:English
Subjects:
Hypothetical particles
Particle theory
Shift registers
Torque
Online Access:Get full text
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Summary:Magnetic skyrmions are currently the most promising option to realize current-driven magnetic shift registers. A variety of concepts to create skyrmions were proposed and demonstrated. However, none of the reported experiments show controlled creation of single skyrmions using integrated designs. Here, we demonstrate that skyrmions can be generated deterministically on subnanosecond timescales in magnetic racetracks at artificial or natural defects using spin orbit torque (SOT) pulses. The mechanism is largely similar to SOT-induced switching of uniformly magnetized elements, but due to the effect of the Dzyaloshinskii-Moriya interaction (DMI), external fields are not required. Our observations provide a simple and reliable means for skyrmion writing that can be readily integrated into racetrack devices.
ISSN:2331-8422
DOI:10.48550/arxiv.1705.01927