TITLE

A frequency-controlled magnetic vortex memory

AUTHOR(S)
Pigeau, B.; de Loubens, G.; Klein, O.; Riegler, A.; Lochner, F.; Schmidt, G.; Molenkamp, L. W.; Tiberkevich, V. S.; Slavin, A. N.
PUB. DATE
March 2010
SOURCE
Applied Physics Letters;3/29/2010, Vol. 96 Issue 13, p132506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Using the ultralow damping NiMnSb half-Heusler alloy patterned into vortex-state magnetic nanodots, we demonstrate a concept of nonvolatile 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=±1 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).
ACCESSION #
48943855

 

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