Ferromagnetism in Co-doped TiO2 rutile thin films grown by laser molecular beam epitaxy

Yuji Matsumoto, Ryota Takahashi, Makoto Murakami, Takashi Koida, Xiao Juan Fan, Tetsuya Hasegawa, Tomoteru Fukumura, M. Kawasaki, Shin Ya Koshihara, Hideomi Koinuma

Research output: Contribution to journalLetterpeer-review

181 Citations (Scopus)

Abstract

Epitaxial TiO2 rutile films were fabricated on α-Al2O3 (101̄2) substrate in the layer-by-layer fashion laser molecular beam epitaxy. Ablation with a Co-doped TiO2 target produced single phase of rutile film with the concentration of Co between 0 and 5%. Some ferromagnetic domain structures were observed in CoxTi1-xO2 rutile films by a scanning superconducting quantum interference device microscope at 3 to 90 K. The magnetic hysteresis could also be observed even at room temperature with a magnetic moment of ∼ 1 μB/Co atom.

Original languageEnglish
Pages (from-to)L1204-L1206
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume40
Issue number11 B
DOIs
Publication statusPublished - 2001 Nov 15
Externally publishedYes

Keywords

  • Combinatorial chemistry
  • Laser MBE
  • Magnetism
  • Oxide
  • Scanning SQUID microscope
  • Thin film
  • TiO
  • Transition metal

ASJC Scopus subject areas

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

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