Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire

Candra Kurniawan, Dede Djuhana, Bambang Soegijono, Dong Hyun Kim

Research output: Contribution to journalArticlepeer-review

Abstract

We report our micromagnetic simulations based on Landau-Lifshitz-Gilbert (LLG) equation for CoFeB nanowire which was exposed by sub-nanosecond magnetic pulse with varied pulse width between 100 and 1000 ps. It is found that the Walker Breakdown field (HWB) shifted as the field pulse duration decreased and reached at the highest value in case of 100 ps pulse width, then decreased steeply with respect to the pulse width up to 400 ps. HWB values are not significantly dependent for pulses longer than 500 ps. It is observed that, below the HWB, the exchange energy is larger than the demagnetization energy in the wider nanowire. By energy density analysis, it is understood that the increase of HWB values in the cases of narrower pulse width was to compensate the energy needed to move the DW.

Original languageEnglish
Pages (from-to)98-102
Number of pages5
JournalCurrent Applied Physics
Volume27
DOIs
Publication statusPublished - Jul 2021

Keywords

  • CoFeB nanowire
  • Domain wall
  • Magnetic pulse
  • Micromagnetics
  • Walker breakdown

Fingerprint Dive into the research topics of 'Micromagnetic investigation of the sub-nanosecond magnetic pulse driven domain wall motion in CoFeB nanowire'. Together they form a unique fingerprint.

Cite this