Room temperature ferromagnetic semiconductor rutile Ti1-xCo xO2-δ epitaxial thin films grown by sputtering method

Takashi Yamasaki, Tomoteru Fukumura, Masaki Nakano, Kazunori Ueno, Masashi Kawasaki

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1 Citation (Scopus)


Room temperature (RT) ferromagnetic semiconductor rutile Ti 1-xCoxO2-δ(101) epitaxial thin films were grown on r-sapphire substrates by a dc sputtering method. Ferromagnetic magnetization, magnetic circular dichroism, and anomalous Hall effect were clearly observed at RT in sputter-grown films for the first time. The magnetization value is nearly as large as 3μβ/Co that is consistent with the high spin state Co2+ in this compound recently established by spectroscopic methods. Consequently, its originally large magneto-optical response is further enhanced.

Original languageEnglish
Pages (from-to)1113021-1113023
Number of pages3
JournalApplied Physics Express
Issue number11
Publication statusPublished - 2008 Nov

ASJC Scopus subject areas

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

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