Dilute magnetic semiconducting oxide thin films and nanostructures
EMSL Project ID
2487
Abstract
As JIN Award 2002, we propose to investigate the growth, magnetic properties and spin-dependent transport in the recently discovered Co-doped anatase ferromagnetic semiconductor thin films. Emphasis will be on the development of a novel, low-temperature, solution chemistry sysnthesis route to obtain thin film heterostructures on a variety of lattice-matched substrates. In addition, one-dimensional nanorods will also be synthesized by electrophoretic deposition of the sols using nanoporous membranes as templates. A wide range of temperature-dependent magnetometry and transport measurements as well as characterizaiton methods using electron, photon and scanning probes will be meployed to understand the microstructure at relevant length scales. This project will not only complement the recently initiated oxygen plasma assisted MBE growth of these materials at PNNL, but will benefit immensely from the synergy between our coordinated research efforts in this rapidly emerging research area of both fundamental importance and technological impact. Finally, we will provide these unique materials to Prof. Gamelin to carry out optical and magneto-optical studies of transition metal ions using their recently constructed magnetic circular dichroism spectropolarimeter.
Project Details
Project type
Exploratory Research
Start Date
2002-03-18
End Date
2005-03-24
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Griffin KA, A Pakhomov, CM Wang, SM Heald, and KM Krishnan. 2005. "Cobalt-Doped Anatase TiO2: A Room Temperature Dilute Magnetic Dielectric Material." Journal of Applied Physics 97:10D320.
Griffin KA, A Pakhomov, CM Wang, SM Heald, and KM Krishnan. 2005. "Intrinsic Ferromagnetism in Insulating Cobalt Doped Anatase TiO? ." Physical Review Letters 94(15):Art. No. 157204.