Domain wall types and field-induced domain wall motion in L-shaped nanowires

Joonyong Kim, Sanghoon Kim, Sangho Lee, Jongill Hong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The formation and behavior of domain walls were studied in L-shaped nanowires via micro-magnetic simulation using the Objective Oriented Micro-Magnetic Frame program. We induced three types of domain walls by varying the thickness of the nanowire. A transverse wall, an asymmetric transverse wall, and a vortex wall were induced in 10, 20, and 40 nm-thick nanowires, respectively. The type of domain walls formed was determined by the competition between exchange and magnetostatic energy. The depinning field of the domain wall was the largest for the 20 nm-thick and the smallest for the 10 nm-thick nanowires. Domain wall behaviors were quite different from one another. The transverse wall in the 10 nm-thick nanowire was annihilated without changing its type. In the case of the 40 nm-thick nanowire, the vortex wall was not transformed to another type, but did switch its polarity throughout the depinning process. The wall in the 20 nm-thick nanowire underwent repetitions of the transformation of type and the switching of polarity until annihilation. Our results confirm that the behavior of a domain wall at a corner or a rounded part of nanowires is very complex and it originates from the different spin structures of a domain wall.

Original languageEnglish
Pages (from-to)8263-8265
Number of pages3
JournalThin Solid Films
Volume519
Issue number23
DOIs
Publication statusPublished - 2011 Sep 30

Fingerprint

Domain walls
Nanowires
domain wall
nanowires
polarity
Vortex flow
vortices
Magnetostatics
magnetostatics
repetition
Switches

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Kim, Joonyong ; Kim, Sanghoon ; Lee, Sangho ; Hong, Jongill. / Domain wall types and field-induced domain wall motion in L-shaped nanowires. In: Thin Solid Films. 2011 ; Vol. 519, No. 23. pp. 8263-8265.
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Domain wall types and field-induced domain wall motion in L-shaped nanowires. / Kim, Joonyong; Kim, Sanghoon; Lee, Sangho; Hong, Jongill.

In: Thin Solid Films, Vol. 519, No. 23, 30.09.2011, p. 8263-8265.

Research output: Contribution to journalArticle

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