Metastable magnetic domain wall dynamics

Mahdi Jamali, Kyoung Jin Lee, Hyunsoo Yang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The dynamics of metastable magnetic domain walls in straight ferromagnetic nanowires under spin waves, external magnetic fields and currentinduced spin-transfer torque are studied by means of micromagnetic simulations. It is found that in contrast to a stable wall, it is possible to displace a metastable domain wall in the absence of external excitation. In addition, independent of the domain wall excitation method, the velocity of a metastable wall is much smaller than that of a stable wall and its displacement direction could be different from that of the stable wall depending on the structure of metastable walls. Under current-induced spin-transfer torque excitation, the direction of domain wall displacement is directly related to the intensity of non-adiabatic spin-transfer torque. In a rough nanowire, it is found that the displacement of a metastable wall could happen much below the critical excitation of a stable wall. Furthermore, we show that it is possible to have either a forward or a backward displacement of a metastable domain wall by changing the pulse width of the excitation.

Original languageEnglish
Article number033010
JournalNew Journal of Physics
Volume14
DOIs
Publication statusPublished - 2012 Mar 1

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magnetic domains
domain wall
torque
excitation
nanowires
magnons
pulse duration
magnetic fields
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Metastable magnetic domain wall dynamics. / Jamali, Mahdi; Lee, Kyoung Jin; Yang, Hyunsoo.

In: New Journal of Physics, Vol. 14, 033010, 01.03.2012.

Research output: Contribution to journalArticle

Jamali, Mahdi ; Lee, Kyoung Jin ; Yang, Hyunsoo. / Metastable magnetic domain wall dynamics. In: New Journal of Physics. 2012 ; Vol. 14.
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