English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Atomic magnetometers (AMs) offer many advantages over superconducting quantuminterference devices (SQUIDs) due to, among other things, having comparablesensitivity while not requiring cryogenics. One of the major limitations of AMsis the challenge of configuring them as gradiometers. We report the developmentof a spin-exchange relaxation free (SERF) vector atomic magnetic gradiometerwith sensitivity of $3\, \rm{fT} \,{cm}^{-1}{Hz}^{-1/2}$ and common moderejection ratio (CMRR) $> 150$ in the band from DC to 100 Hz. We introduce abackground suppression figure of merit for characterizing the performance ofgradiometers. It allows for optimally setting the measurement baseline, and forquickly assessing the advantage, if any, of performing a measurement ingradiometric mode. As an application, we consider the problem of fetalmagnetocardiography (fMCG) detection in the presence of a large backgroundmaternal MCG signal.

Characterizing atomic magnetic gradiometers for fetal magnetocardiography