A Frequency-Controlled Magnetic Vortex Memory

Using the ultra low damping NiMnSb half-Heusler alloy patterned into vortex-state magnetic nano-dots, we demonstrate a new concept of non-volatile memory controlled by the frequency. A perpendicular bias magnetic field is used to split the frequency of the vortex core gyrotropic rotation into two di...

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Bibliographic Details
Published in:arXiv.org 2010-02
Main Authors: Pigeau, B, Grégoire De Loubens, Klein, O, Riegler, A, Lochner, F, Schmidt, G, Molenkamp, L W, Tiberkevich, V S, Slavin, A N
Format: Article
Language:English
Subjects:
Damping
Heusler alloys
Magnetic resonance
Polarity
Resonant frequencies
Vortices
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Summary:Using the ultra low damping NiMnSb half-Heusler alloy patterned into vortex-state magnetic nano-dots, we demonstrate a new concept of non-volatile memory controlled by the frequency. A perpendicular bias magnetic field is used to split the frequency of the vortex core gyrotropic rotation into two distinct frequencies, depending on the sign of the vortex core polarity \(p=\pm1\) inside the dot. A magnetic resonance force microscope and microwave pulses applied at one of these two resonant frequencies allow for local and deterministic addressing of binary information (core polarity).
ISSN:2331-8422
DOI:10.48550/arxiv.1003.0158