Intrinsic Ferromagnetism in the Diluted Magnetic Semiconductor Co:TiO_{2}.
- Saadaoui H Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
- Luo X School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia.
- Salman Z Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
- Cui XY School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia.
- Bao NN Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore.
- Bao P School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.
- Zheng RK School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.
- Tseng LT School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia.
- Du YH Institute of Chemical and Engineering Science, Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Jurong Island, 627833, Singapore.
- Prokscha T Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
- Suter A Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
- Liu T ANKA, Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany.
- Wang YR School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia.
- Li S School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia.
- Ding J Department of Materials Science and Engineering, National University of Singapore, 119260, Singapore.
- Ringer SP School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, New South Wales 2006, Australia.
- Morenzoni E Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland.
- Yi JB School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia.
- 2016-12-08
Published in:
- Physical review letters. - 2016
English
Here we present a study of magnetism in Co_{0.05}Ti_{0.95}O_{2-δ} anatase films grown by pulsed laser deposition under a variety of oxygen partial pressures and deposition rates. Energy-dispersive spectrometry and transmission electron microscopy analyses indicate that a high deposition rate leads to a homogeneous microstructure, while a very low rate or postannealing results in cobalt clustering. Depth resolved low-energy muon spin rotation experiments show that films grown at a low oxygen partial pressure (≈10^{-6} torr) with a uniform structure are fully magnetic, indicating intrinsic ferromagnetism. First principles calculations identify the beneficial role of low oxygen partial pressure in the realization of uniform carrier-mediated ferromagnetism. This work demonstrates that Co:TiO_{2} is an intrinsic diluted magnetic semiconductor.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1103/PhysRevLett.117.227202
- PMID 27925730
- Persistent URL
- https://sonar.ch/global/documents/278413
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