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

doi:10.1063/1.1420434

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 Co_xTi_1-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 Co_xTi_1-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 Co_xTi_1-xO₂. The magnetic properties of OPA-MBE grown material are significantly better than those of analogous pulsed laser deposition-grown material.

Original language	English (US)
Pages (from-to)	3467-3469
Number of pages	3
Journal	Applied Physics Letters
Volume	79
Issue number	21
DOIs	https://doi.org/10.1063/1.1420434
State	Published - Nov 19 2001
Externally published	Yes

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Physics and Astronomy (miscellaneous)

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title = "Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase",

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.",

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

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doi = "10.1063/1.1420434",

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journal = "Applied Physics Letters",

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TY - JOUR

T1 - Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase

AU - Chambers, S. A.

AU - Thevuthasan, S.

AU - Farrow, R. F.C.

AU - Marks, R. F.

AU - Thiele, J. U.

AU - Folks, L.

AU - Samant, M. G.

AU - Kellock, A. J.

AU - Ruzycki, N.

AU - Ederer, D. L.

AU - Diebold, U.

PY - 2001/11/19

Y1 - 2001/11/19

N2 - 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.

AB - 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.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 21

ER -

Epitaxial growth and properties of ferromagnetic co-doped TiO₂ anatase

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