Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase

Authors
Chambers, SA Thevuthasan, S Farrow, RFC Marks, RF Thiele, JU Folks, L Samant, MG Kellock, AJ Ruzycki, N Ederer, DL Diebold, U
Citation
Sa. Chambers et al., Epitaxial growth and properties of ferromagnetic co-doped TiO2 anatase, APPL PHYS L, 79(21), 2001, pp. 3467-3469
Citations number
10
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
79
Issue
21
Year of publication
2001
Pages
3467 - 3469
Database
ISI
SICI code
0003-6951(20011119)79:21<3467:EGAPOF>2.0.ZU;2-I
Abstract
We have used oxygen-plasma-assisted molecular-beam epitaxy (OPA-MBE) to gro w CoxTi1-xO2 anatase on SrTiO3(001) for x=similar to0.01-0.10, and have mea sured the structural, compositional, and magnetic properties of the resulti ng films. Whether epitaxial or polycrystalline, these CoxTi1-xO2 films are ferromagnetic semiconductors at and above room temperature. However, the ma gnetic and structural properties depend critically on the Co distribution, which varies widely with growth conditions. Co is substitutional in the ana tase lattice and in the +2 formal oxidation state in ferromagnetic CoxTi1-x O2. The magnetic properties of OPA-MBE grown material are significantly bet ter than those of analogous pulsed laser deposition-grown material. (C) 200 1 American Institute of Physics.