Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase

S. A. Chambers, S. Thevuthasan, R. F C Farrow, R. F. Marks, J. U. Thiele, L. Folks, M. G. Samant, A. J. Kellock, N. Ruzycki, D. L. Ederer, U. Diebold

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Abstract

We have used oxygen-plasma-assisted molecular-beam epitaxy (OPA-MBE) to grow CoxTi1-xO2 anatase on SrTiO3(001) for x = ∼0.01-0.10, and have measured the structural, compositional, and magnetic properties of the resulting films. Whether epitaxial or polycrystalline, these CoxTi1-xO2 films are ferromagnetic semiconductors at and above room temperature. However, the magnetic and structural properties depend critically on the Co distribution, which varies widely with growth conditions. Co is substitutional in the anatase lattice and in the +2 formal oxidation state in ferromagnetic CoxTi1-xO2. The magnetic properties of OPA-MBE grown material are significantly better than those of analogous pulsed laser deposition-grown material.

Original languageEnglish
Pages (from-to)3467-3469
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number21
DOIs
Publication statusPublished - 19 Nov 2001
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Chambers, S. A., Thevuthasan, S., Farrow, R. F. C., Marks, R. F., Thiele, J. U., Folks, L., Samant, M. G., Kellock, A. J., Ruzycki, N., Ederer, D. L., & Diebold, U. (2001). Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase. Applied Physics Letters, 79(21), 3467-3469. https://doi.org/10.1063/1.1420434