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

Magnetometers based on nitrogen-vacancy (NV) centers in diamond are promisingroom-temperature, solid-state sensors. However, their reported sensitivity tomagnetic fields at low frequencies (<1 kHz) is presently >10 pT s^{1/2},precluding potential applications in medical imaging, geoscience, andnavigation. Here we show that high-permeability magnetic flux concentrators,which collect magnetic flux from a larger area and concentrate it into thediamond sensor, can be used to improve the sensitivity of diamondmagnetometers. By inserting an NV-doped diamond membrane between two ferritecones in a bowtie configuration, we realize a ~250-fold increase of themagnetic field amplitude within the diamond. We demonstrate a sensitivity of~0.9 pT s^{1/2} to magnetic fields in the frequency range between 10 and 1000Hz, using a dual-resonance modulation technique to suppress the effect ofthermal shifts of the NV spin levels. This is accomplished using 200 mW oflaser power and 20 mW of microwave power. This work introduces a new dimensionfor diamond quantum sensors by using micro-structured magnetic materials tomanipulate magnetic fields.

Diamond magnetometer enhanced by ferrite flux concentrators