Ultrahigh sensitivity magnetic field and magnetization measurements with an atomic magnetometer

By H. Dang, A. Maloof, M. Romalis. 2009

771 citations recorded by the source corpus.

We describe an ultrasensitive atomic magnetometer based on optically pumped potassium atoms operating in a spin-exchange relaxation free regime. We demonstrate magnetic field sensitivity of 160 aT/Hz1/2 in a gradiometer arrangement with a measurement volume of 0.45 cm3 and energy resolution per unit bandwidth of 44ℏ. As an example of an application enabled by such a magnetometer, we describe measurements of weak remnant rock magnetization as a function of temperature with a sensitivity on the order of 10−10 emu/cm3/Hz1/2 and temperatures up to 420°C.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/67ab9a3521b1c523176bfa295f0e7c142b08ed6d

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Quantum-enhanced measurements without entanglement (2017, background): “…et al., 2010a), laser interferometers at high power (Aasi et al., 2013; The LIGO Scientific Collaboration, 2011), high-density atomic magnetometers (Dang et al., 2010; Kominis et al., 2003; Shah et al., 2010; Vasilakis et al., 2011) and highdensity atomic clocks (Deutsch et al., 2010), the…”
Subpicotesla Diamond Magnetometry (2014, background): “Furthermore, superconducting quantum-interference devices (SQUID) [5] and atomic vapor cells [6] are at the forefront of magnetic sensitivities, and they explore the limits for detection of fundamental flux quantization.”
Electric dipole moments of atoms, molecules, nuclei, and particles (2017, positive): “For observation times τ up to about 10 s, the typically observed sensitivity of alkali-metal magnetometers is (Dang et al., 2010) σB ∼ 1− 10 fT√ Hz × 1√ τ .”
Quantum technology for military applications (2021, background): “Spin-polarised high-density atomic vapour undergoes state transition under external magnetic field which can be measured optically [92, 108, 109].”
Atomic Sensors – A Review (2011, methodology): “With this method, sensitivities below 1 , similar to those of the best superconducting magnetometers, have been reached with DC [42] and RF [43] optical sensors.”
A new generation of magnetoencephalography: Room temperature measurements using optically-pumped magnetometers (2017, methodology): “The modulation of the transmitted light, which is monitored using a lock-in process, is sensitive to the ambient field component along the modulation axis (Dupont-Roc et al., 1969; Shah et al., 2007).”