Spin Polarization Contrast Observed in GaAs by Force-Detected Nuclear Magnetic Resonance
Abstract
We applied the recently developed technique of force-detected nuclear magnetic resonance (NMR) to observe 71Ga, 69Ga, and 75As in GaAs. The nuclear spin-lattice relaxation time is 21 5 min for 69Ga at 5 K and 4.6 Tesla. We have exploited this long relaxation time to first create and then observe spatially varying nuclear spin polarization within the sample, demonstrating a new form of contrast for magnetic resonance force microscopy (MRFM). Such nuclear spin contrast could be used to indirectly image electron spin polarization in GaAs-based spintronic devices.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 2008
- Accession Number
- ADA522804
Entities
People
- Doran D. Smith
- Kent R. Thurber
- Lee E Harrell
- Raul Fainchtein
Organizations
- United States Army Research Laboratory