A Frequency-Controlled Magnetic Vortex Memory

Abstract : 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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Submitted on : Monday, February 22, 2010 - 6:33:53 PM
Last modification on : Thursday, February 7, 2019 - 4:56:22 PM
Long-term archiving on : Friday, June 18, 2010 - 7:37:28 PM

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B. Pigeau, G. de Loubens, O. Klein, A. Riegler, F. Lochner, et al.. A Frequency-Controlled Magnetic Vortex Memory. Applied Physics Letters, American Institute of Physics, 2010, 96 (13), pp.132506. ⟨10.1063/1.3373833⟩. ⟨hal-00458967⟩

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