Transition between onion states and vortex states in exchange-coupled Ni-FeMn-Ir asymmetric ring dots

Isao Sasaki, Ryoichi Nakatani, Yasushi Endo, Yoshio Kawamura, Masahiko Yamamoto, Takashi Takenaga, Sunao Aya, Takeharu Kuroiwa, Sadeh Beysen, Hiroshi Kobayashi

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3 Citations (Scopus)

Abstract

The transition between onion states and vortex states in exchange-coupled Ni-FeMn-Ir asymmetric ring dots has been investigated. A direction of domain wall motion, during the transition from the single-domain state to the vortex state via the onion state, depends on a sweep direction of an external field. This dependence fixes the directions of vortical magnetizations in the vortex states. The derivative of the amount of the domain wall motion with respect to the external field depends on the sweep direction of external field, and thus the hysteresis loop becomes asymmetric.

Original languageEnglish
Article number08G303
JournalJournal of Applied Physics
Volume99
Issue number8
DOIs
Publication statusPublished - 2006 May 25
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sasaki, I., Nakatani, R., Endo, Y., Kawamura, Y., Yamamoto, M., Takenaga, T., Aya, S., Kuroiwa, T., Beysen, S., & Kobayashi, H. (2006). Transition between onion states and vortex states in exchange-coupled Ni-FeMn-Ir asymmetric ring dots. Journal of Applied Physics, 99(8), [08G303]. https://doi.org/10.1063/1.2164435