Writing and storing information in an array of magnetic vortex nanodisks using their azimuthal modes

H. Vigo-Cotrina, A. P. Guimarães

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The switching of a vortex core of a single disk in an array of a multilayer system is investigated by micromagnetic simulation. We found that the perpendicular uniaxial anisotropy decreases the frequencies of the azimuthal mode in disks with magnetic vortex configuration. We obtained a phase diagram of magnetic field intensity vs. frequency of the azimuthal mode, as a function of the value of perpendicular uniaxial anisotropy. We demonstrated that rotating magnetic fields (CW and CCW) with frequency equal to azimuthal modes can be used to switch the vortex core of single disks in a disk array. This allows obtaining different memory states with a single array of nanodisks, and therefore writing information through the application of rotating fields.

Original languageEnglish
Pages (from-to)160-164
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume460
DOIs
StatePublished - 15 Aug 2018

Keywords

  • Azimuthal mode
  • Magnetic vortex
  • Memory states
  • Perpendicular anisotropy
  • Vortex core switching

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