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

Abstract

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.

arXiv comment14 pages, 12 figures

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Cited by in corpus (7)

• Nanoscale Dichotomy of Ti 3d Carriers Mediating the Ferromagnetism in Co:TiO2 Anatase Thin Films
• Ferromagnetism of cobalt-doped anatase TiO${}_2$ studied by bulk- and surface-sensitive soft x-ray magnetic circular dichroism
• Bulk and Surface Magnetization of Co atoms in Rutile Ti_[1-x]Co_xO_[2-delta] Thin Films Revealed by X-Ray Magnetic Circular Dichroism
• Electromagnetic waves reflection, transmission and absorption by graphene - magnetic semiconductor - graphene sandwich-structure in magnetic field: Faraday geometry
• X-ray absorption spectroscopy and X-ray magnetic circular dichroism studies of transition-metal-co-doped ZnO nano-particles
• Electron carrier-mediated room temperature ferromagnetism in anatase (Ti,Co)O2
• Ferromagnetic ordering in dilute magnetic dielectrics with and without free carriers