Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO 2

T. Fukumura, H. Toyosaki, K. Ueno, M. Nakano, M. Kawasaki

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44 Citations (Scopus)

Abstract

Electric and magnetic properties of a high-temperature ferromagnetic oxide semiconductor, cobalt-doped rutile TiO2, are summarized. Cobalt-doped rutile TiO2 epitaxial thin films with different electron densities and cobalt contents were grown on r -sapphire substrates with laser molecular beam epitaxy. Results of magnetization, magnetic circular dichroism and anomalous Hall-effect measurements were examined for samples with systematically varied electron densities and cobalt contents. The samples with high electron densities and cobalt contents show high-temperature ferromagnetism, suggesting that charge carriers induce the ferromagnetism.

Original languageEnglish
Article number055018
JournalNew Journal of Physics
Volume10
DOIs
Publication statusPublished - 2008 May 23

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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