Accurate vector measurement of residual magnetic fields with a Rb-Xe nuclear-spin magnetometer.
We demonstrate a frequency-referenced vector measurement of weak residual magnetic fields using a hybrid 87Rb-129Xe magnetometer operated in a near-zero-field environment. The magnetic-field magnitude is obtained from the Larmor precession frequency of hyperpolarized 129Xe nuclear spins via free-induction decay (FID) d...