Transition from superparamagnetic to ferromagnetic state of ultrathin Fe films grown on inclined Al2O3(0001) substrates

Yu Shiratsuchi, Yasushi Endo, Masahiko Yamamoto

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The magnetic states of 10 ML Fe films grown on inclined Al 2O3(0001) substrates were investigated in the transition region of superparamagnetic to ferromagnetic states. The ratio of the superparamagnetic and ferromagnetic components is dependent on both the growth temperature and the inclination of the substrate. The maximum ratio of the ferromagnetic to superparamagnetic was observed in ultrathin Fe films grown on flat substrates at a growth temperature of 473 K. The difference in crystallinity of Fe at each temperature explains the observed behavior. On the other hand, the ratio of ferromagnetic to superparamagnetic components for Fe films grown on inclined substrates behaves in a complex manner with the growth temperature and is also influenced by the uniaxial magnetic anisotropy, which is induced by the inclination of substrate.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalThin Solid Films
Volume464-465
DOIs
Publication statusPublished - 2004 Oct 1
Externally publishedYes

Keywords

  • AlO
  • Fe
  • Ferromagnetism
  • Inclined substrate
  • Superparamagnetism

ASJC Scopus subject areas

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

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