Skyrmion Creation and Manipulation by Nano-Second Current Pulses

Easy creation and manipulation of skyrmions is important in skyrmion based devices for data storage and information processing. We show that a nano-second current pulse alone is capable of creating/deleting and manipulating skyrmions in a spin valve with a perpendicularly magnetized free layer and b...

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Bibliographic Details
Published inScientific reports Vol. 6; no. 1; p. 22638
Main Authors Yuan, H. Y., Wang, X. R.
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 03.03.2016
Nature Publishing Group
Subjects
639/301/119/997
Data processing
Data storage
Humanities and Social Sciences
Information processing
multidisciplinary
Polarity
Science
Valves
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Summary:Easy creation and manipulation of skyrmions is important in skyrmion based devices for data storage and information processing. We show that a nano-second current pulse alone is capable of creating/deleting and manipulating skyrmions in a spin valve with a perpendicularly magnetized free layer and broken chiral symmetry. Interestingly, for an in-plane magnetized fixed layer, the free layer changes from a single domain at zero current to a Neel wall at an intermediate current density. Reverse the current polarity, the Neel wall changes to its image inversion. A properly designed nano-second current pulse, that tends to convert one type of Neel walls to its image inversion, ends up to create a stable skyrmion without assistance of external fields. For a perpendicularly magnetized fixed layer, the skyrmion size can be effectively tuned by a current density.
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ISSN:2045-2322
2045-2322
DOI:10.1038/srep22638