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Deposition of Cobalt-doped Oxides for Spintronic Applications


EMSL Project ID
11592

Abstract

The mechanism of magnetism in novel oxide-based dilute ferromagnetic semiconductors is not understood. Knowing the nature and relative position of the magnetic species in the material can help elucidate the coupling mechanism resulting in ferromagnetism. Electron paramagnetic resonance (EPR) is an ideal method to determine the nature, concentration, and position of magnetic species in these materials. Initially, EPR will be utilized to study a pure rutile TiO2 single crystal. Reduction of this single crystal by vacuum annealing resulted in a ferromagnetic response, which is unexpected in this system. EPR will allow the determination of the magnetic species in this material. EPR may later be extended to study doped ferromagnetic materials such as Cr-doped anatase TiO2 and Co-doped SrTiO3.

Project Details

Project type
Capability Research
Start Date
2004-12-29
End Date
2006-04-18
Status
Closed

Team

Principal Investigator

Tiffany Kaspar
Institution
Pacific Northwest National Laboratory

Team Members

Michael Bowman
Institution
University of Alabama

Scott Chambers
Institution
Pacific Northwest National Laboratory