Here we demonstrate a Spin-Exchange Relaxation-Free (SERF) magnetometer with sensitivity \\approx 1~{m fT/\\sqrt{Hz}} \\approx 1~{m fT/\\sqrt{Hz}} and an effective sensing volume of 0.1 m{cm^3} m{cm^3} that may
Spin-exchange relaxation free alkali-metal magnetometers typically operate inthe regime of high optical density, presenting challenges for simple andefficient optical pumping and detection. We describe a high-sensitivity Rbmagnetometer using a single elliptically-polarized off-resonant laser beam.Circular ...
In a K-Rb-21Ne co-magnetometer, the alkali spin ensemble couples with the noble gas spin ensemble through spin exchange interaction8, and alkali atoms are in the spin exchange relaxation free (SERF) regime9 to sensitively detect the direction of the 21Ne nuclear spin. The SERF regime has ...
We describe a Cs atomic magnetometer operating in the spin-exchange relaxation-free (SERF) regime. With a vapor cell temperature of $103^\circ\rm{C}$ we achieve intrinsic magnetic resonance widths $\Delta B=17 {\rm \mu G}$ corresponding to an electron spin-relaxation rate of $300 {\rm...
(OPM)9,10reaching femto-tesla detection levels and more recently Spin Exchange Relaxation Free (SERF) atomic magnetometers on pico-tesla range11,12. Despite the very low field detection capability, SQUIDs require cryogenic environments13and OPMs rely on complex optical parts14, hampering a ...
Alkali-metal magnetometers compete with SQUID detectors as the most sensitive magnetic field sensors. Their sensitivity is limited by relaxation due to spin-exchange collisions. We demonstrate a K magnetometer in which spin-exchange relaxation is completely eliminated by operating at high K density and...
microscopy (SEM) images captured with the Zeiss Supra 40 instrument. Moreover, various magnetic measurements, including isothermal magnetization (M(H)), temperature-dependent magnetization (M(T)), and magnetic relaxation (M(t)), were conducted using a commercial SQUID magnetometer from Quantum ...
Inside a spin-exchange relaxation-free (SERF) co-magnetometer with a high-pressure buffer gas atomic cell, the magnetic field gradient causes the decoherence of atomic spins to produce magnetic-field gradient relaxation. This paper presents a new method for the accurate measurement of magnetic field...
curve, caused by the exchange splitting, and its stronger damping, caused by the shorter inelastic mean free path are clearly seen. A second example is the study of the so-called spin reorientation transition in which the magnetization rotates from out-of-plane to in-plane with increasing ...
magnetometers such as superconducting quantum interference devices or spin exchange relaxation-free atomic vapors21,22,23, NVs can operate in ambient conditions without cryogenics or magnetic shielding, but their sensitivity is limited to pT-level2,13,24,25. For spin magnetometers, the standard ...