A Frequency-Controlled Magnetic Vortex Memory

Details A Frequency-Controlled Magnetic Vortex Memory A Frequency-Controlled Magnetic Vortex Memory

2010-02-28

arxiv.org/abs/1003.0158v1

Applied Physics Letters 96, 13 (2010) 132506

Physics

Condensed Matter

Materials Science

Scientific paper

10.1063/1.3373833

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).

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