Magnetism of ultrathin Fe films in the vicinity of transition from ferromagnetism to superparamagnetism

Yu Shiratsuchi, Yasushi Endo, Masahiko Yamamoto

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

Abstract

We have investigated the magnetism of ultrathin Fe films grown on the inclined Al2O3(0001), especially, in the vicinity of ferromagnetic-superparamagnetic transition. In the transition region, the magnetic state of Fe films is the coexistence of ferromagnetism and superparamagnetism. The ratio of the components in ferromagnetic and superparamagnetic state is dependent on the growth temperature. For Fe grown on the flat substrate without the inclination, as the growth temperature increases, the ratio of the component in ferromagnetic state increases, reaches to the maximum and decreases again. On the presence of substrate inclination, the ratio of the component in ferromagnetic state increases, reaches to the maximum and decreases again, decreases monotonically with increasing growth temperature. We investigated the dominant factor of the complex magnetic state, and clarified that the complex magnetic state is dominated by the change of the film structure and the effective magnetic anisotropy energy.

Original languageEnglish
Title of host publicationAdvanced Structural and Functional Materials Design - Proceedings of the International Symposium on Advanced Structural and Functional Materials Design, 2004
PublisherTrans Tech Publications Ltd
Pages165-170
Number of pages6
ISBN (Print)0878499962, 9780878499960
DOIs
Publication statusPublished - 2006 Jan 1
Externally publishedYes
EventInternational Symposium on Advanced Structural and Functional Materials Design, 2004 - Osaka, Japan
Duration: 2004 Nov 102004 Nov 12

Publication series

NameMaterials Science Forum
Volume512
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherInternational Symposium on Advanced Structural and Functional Materials Design, 2004
CountryJapan
CityOsaka
Period04/11/1004/11/12

Keywords

  • Ferromagnetism
  • Superparamagnetism
  • Ultrathin Fe film

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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