Room Temperature Ferromagnetism in Ion-implanted Co-doped TiO₂(110) Rutile

Journal Article · Mon May 31 04:00:00 EDT 2004 · Applied Physics Letters, 84(22):4466-4468

DOI:https://doi.org/10.1063/1.1753652· OSTI ID:15008822

Shutthanandan, V.; Thevuthasan, Suntharampillai; Heald, Steve M.; Droubay, Timothy C.; Engelhard, Mark H.; Kaspar, Tiffany C.; McCready, David E.; Saraf, Laxmikant V.; Chambers, Scott A.; Mun, B. S.; Hamdan, N. M.; Nachimuthu, Ponnusamy; Taylor, B.; Sears, R.; Sinkovic, Boris

Ferromagnetic Co-doped rutile TiO₂ singel crystals were successfully synthesized by high temperature ion implantation and charaterized by a variety of techniques. Co is uniformly distrubuted to the depth of ~300nm with an average concentration of ~2 at. %, except in the near-surface region, where the concentration is ~3 at. %. Magnetic measurements reval ferromagnetic behavior at room temperature with an effective saturation magnetization of ~0.6 ub/Co atom. The Co formal oxidation state is found to be +2 throughouth the implanted region, and no Co(0) is detected.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15008822
• Report Number(s): PNNL-SA-40229; 6292; KP1704020
• Journal Information: Applied Physics Letters, 84(22):4466-4468, Journal Name: Applied Physics Letters, 84(22):4466-4468
• Country of Publication: United States
• Language: English

Related Subjects

Diluted Magnetic Semiconductor
Ferremognetic materials
Vibrating Sample Magnetometry
ion implantation
Cobalt
rutile-TiO₂
Environmental Molecular Sciences Laboratory