Spin polarization contrast observed in GaAs by force-detected nuclear magnetic resonance

Details Spin polarization contrast observed in GaAs by force-detected nuclear magnetic resonance Spin polarization contrast observed in GaAs by force-detected nuclear magnetic resonance

2002-01-14

arxiv.org/abs/cond-mat/0201216v1

Appl. Phys. Lett. 80, 1794 (2002)

Physics

Condensed Matter

Materials Science

3 pages, 2 figures

Scientific paper

10.1063/1.1458688

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$\pm$5 min for 69Ga at $\sim 5$ 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.

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