Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO2

Details Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO2 Role of charge carriers for ferromagnetism in cobalt-doped rutile TiO2

2008-05-24

arxiv.org/abs/0805.3748v1

New J. Phys. 10, 055018 (2008)

Physics

Condensed Matter

Materials Science

14 pages, 12 figures

Scientific paper

10.1088/1367-2630/10/5/055018

Electric and magnetic properties of a high temperature ferromagnetic oxide semiconductor, cobalt-doped rutile TiO2, are summarized. The 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 the high temperature ferromagnetism, suggesting that charge carriers induce the ferromagnetism.

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