Magnetic properties of Fe1.2Ti0.8O 3/Fe2O3 bilayered films

Tatsuo Fujii, Yusuke Takada, Makoto Nakanishi, Jun Takada

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4 Citations (Scopus)

Abstract

Hematite-ilmenite (α-Fe2O3-FeTiO3) solid solution system is one of the candidates for high-temperature magnetic semiconductors. The intermediate composition, Fe1.2Ti 0.8O3, is known to have the maximum saturation magnetization at low temperature. We have successfully prepared well-crystallized Fe1.2Ti0.8O3 and Fe 1.2Ti0.8Fe2O3 bilayered films by using reactive helicon plasma sputtering. The Fe1.2Ti 0.8O3 films without Fe2O3 layers showed lower TC of about 200 K, while the TC of Fe 1.2Ti0.8O3 layers in the bilayered films increased to about 220 K. The bilayered films had a sharp interface between Fe1.2Ti0.8O3 and α-Fe2O 3. The strong magnetic coupling between two layers seemed to increase the TC of the attached Fe1.2Ti0.8O3 layers.

Original languageEnglish
Pages (from-to)2775-2777
Number of pages3
JournalIEEE Transactions on Magnetics
Volume41
Issue number10
DOIs
Publication statusPublished - Oct 2005

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Keywords

  • Exchange coupling
  • Iron titanium oxides
  • Magnetic semiconductor
  • Sputtered film

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

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