Electrically detected magnetic resonance in a W-band microwave cavity

V. Lang, C. C. Lo, R. E. George, S. A. Lyon, J. Bokor, T. Schenkel, A. Ardavan, J. J.L. Morton

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We describe a low-temperature sample probe for the electrical detection of magnetic resonance in a resonant W-band (94 GHz) microwave cavity. The advantages of this approach are demonstrated by experiments on silicon field-effect transistors. A comparison with conventional low-frequency measurements at X-band (9.7 GHz) on the same devices reveals an up to 100-fold enhancement of the signal intensity. In addition, resonance lines that are unresolved at X-band are clearly separated in the W-band measurements. Electrically detected magnetic resonance at high magnetic fields and high microwave frequencies is therefore a very sensitive technique for studying electron spins with an enhanced spectral resolution and sensitivity.

Original languageEnglish (US)
Article number034704
JournalReview of Scientific Instruments
Issue number3
StatePublished - Mar 2011

All Science Journal Classification (ASJC) codes

  • Instrumentation

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    Lang, V., Lo, C. C., George, R. E., Lyon, S. A., Bokor, J., Schenkel, T., Ardavan, A., & Morton, J. J. L. (2011). Electrically detected magnetic resonance in a W-band microwave cavity. Review of Scientific Instruments, 82(3), [034704]. https://doi.org/10.1063/1.3557395