Detection and manipulation of statistical polarization in small spin ensembles.

  title={Detection and manipulation of statistical polarization in small spin ensembles.},
  author={H. Jonathon Mamin and R. Budakian and Benjamin W Chui and Daniel Rugar},
  journal={Physical review letters},
  volume={91 20},
We report the detection of the square root of N statistical polarization in a small ensemble of electron spin centers in SiO2 by magnetic resonance force microscopy. A novel detection technique was employed that captures the statistical polarization and cycles it between states that are either locked or antilocked to the effective field in the rotating frame. Using field gradients as high as 5 G/nm, we achieved a detection sensitivity equivalent to roughly two electron spins, and observed… CONTINUE READING

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