Critical phenomena in magnetic vortex formation probed by noise spectroscopy

E. Saitoh, K. Harii, H. Miyajima, T. Yamaoka

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


Transition between a vortex magnetic state and a uniform magnetic state in a Ni81Fe19 mesoscopic ring has been investigated in terms of resistive-noise spectroscopy. The observed low-frequency noise exhibits critical enhancement around the magnetization saturation. This noise enhancement can be argued from the viewpoint of the critical phenomena due to the chiral-symmetry breakdown of mesoscopic magnetic-structure, which can present a typical mechanism of symmetry transition of magnetic structure in mesoscopic ferromagnets.

Original languageEnglish
Pages (from-to)25-27
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Issue number1-3
Publication statusPublished - 2004 Nov 1
EventInternational Symposium on Advanced Magnetic Technologies - Taipei, Taiwan, Province of China
Duration: 2003 Nov 132003 Nov 16


  • Critical phenomena
  • Nano magnetics
  • Nano ring

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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