Magnetic force microscopic study on domain-wall molecules in NiFe nano rings

Kohei Sasage, Naoya Okamoto, Hana Tsujikawa, Takehiro Yamaoka, Eiji Saitoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A pair of magnetic domain walls (DWs) in ferromagnetic NiFe rings has been investigated in terms of the magnetic force microscopy (MFM). When the distance between the rings d is greater than a threshold value dth, MFM signals indicate that a DW in the ring is dragged due to a stray magnetic field from an MFM probe tip. When d < dth, this drag signals disappears; DWs are bound to each other by the DW-DW interaction. This transition can be argued in terms of the competition between the DW-DW magnetostatic interaction and the DW-drag potential. From the d-dependent MFM data, the DW-drag potential was estimated.

Original languageEnglish
Title of host publicationMagnetism and Magnetic Materials
PublisherTrans Tech Publications Ltd
Number of pages4
ISBN (Print)390845168X, 9783908451686
Publication statusPublished - 2009
Externally publishedYes
EventForth Moscow International Symposium on Magnetism MISM2008 - Moscow, Russian Federation
Duration: 2008 Jun 202008 Jun 25

Publication series

NameSolid State Phenomena
ISSN (Print)1012-0394


OtherForth Moscow International Symposium on Magnetism MISM2008
Country/TerritoryRussian Federation


  • Dw drag
  • Dw molecule
  • Magnetic force microscopy
  • Micro magnetic simulation
  • Single magnetic domain wall (dw)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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