Individual magnetization reversal of a square dot matrix by common current excitation

Mehrdad Elyasi, Charanjit S. Bhatia, Hyunsoo Yang

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We have proposed a method for magnetization reversal of individual sites of a 2 by 2 matrix of perpendicularly magnetized dots by common current excitation. The spin-polarized current signal consists of a dc-biased ac part followed by a pure dc one. The amplitude of the dc and ac parts of the current, as well as the phase and duration of the ac current, determine the reversal sites through the magnetostatic interaction among the dots. We show that the individual selectivity in magnetization reversal occurs through two consecutive steps, dephasing of the matrix dyadic pairs dynamics followed by nonlinear dephasing of the individual elements. This method can be utilized to increase the storage density of magnetic random access memory by enabling common access for four or more bits.

Original languageEnglish
Article number295301
JournalJournal of Physics D: Applied Physics
Volume48
Issue number29
DOIs
Publication statusPublished - 2015 Jul 29
Externally publishedYes

Keywords

  • collective behaviors of magnetism
  • magnetic random access memory
  • magnetization reversal
  • spintronics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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