Geometric effect in magnetization reversal studied by spin-polarized secondary electron microscopy

Shigenori Ueda, Yoh Iwasaki, Yoichi Uehara, Sukekatsu Ushioda

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have studied the magnetic domain structures and reversal processes of Fe thin films on two-dimensionally arranged hexagonal land-and-groove substrates by using spin-polarized secondary electron microscopy (SP-SEM). The coercivity difference between the land and groove was partly due to the difference in surface roughness between these areas. Weak domain wall pinning at the boundary between the land and groove areas occurred in the magnetization reversal process. The magnetic domain structures and reversal processes were found to depend on film geometry. It was also found that the anisotropy induced by film geometry for the hexagonal land-and-groove structure is weaker than that for the rectangular one. These results suggest that symmetry of film geometry and surface roughness play important roles for the magnetic domain structures and reversal processes in thin magnetic films.

Original languageEnglish
Pages (from-to)5004-5008
Number of pages5
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number6 A
DOIs
Publication statusPublished - 2006 Jun 28

Keywords

  • Domain wall pinning
  • Fe
  • Film geometry
  • Land-and-groove structure
  • Magnetic domain
  • SP-SEM
  • Surface roughness

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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