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

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:460

Article

Vigo-Cotrina, H.¹  Guimaraes, A. P.¹ 

[1] Ctr Brasileiro Pesquisas Fis, BR-22290180 Rio De Janeiro, RJ, Brazil

关键词: Magnetic vortex;    Azimuthal mode;    Vortex core switching;    Perpendicular anisotropy;    Memory states;   

DOI  :  10.1016/j.jmmm.2018.03.064

来源: Elsevier

【 摘 要 】

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. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

Free