2026-10-10T17:57:14Z https://api.figshare.com/v2/oai

oai:figshare.com:article/33859777 2026-09-16T15:53:23Z portal_1197 item_type_3 month_year_09_2026

Data for : Fiber-coupled Diamond Magnetometry with an Unshielded 30 pT/sqrt(Hz)) sensitivity Simon Graham (760460) A. T. M. A. Rahman (14364144) L. Munn (14364147) R. L. Patel (14364150) A. J. Newman (14364153) Colin J. Stephen (17493036) A. Nikitin Colston (24994267) A. M. Edmonds (14364162) D. J. Twitchen (14364165) M. L. Markham (16145327) Gavin Morley (6564578) Migrated from ePrints Ensembles of nitrogen-vacancy centers (NVCs) in diamond can be employed for sensitive magnetometry. In this work, we present a fiber-coupled NVC magnetometer with an unshielded sensitivity of (30 ± 10) pT/ √Hz in a (10–500)-Hz frequency range. This sensitivity is enabled by a relatively high green-to-red-photon conversion efficiency, the use of a [100] bias-field alignment, microwave and lock-in amplifier (LIA) parameter optimization, as well as a balanced hyperfine-excitation scheme. Furthermore, a silicon carbide (SiC) heat spreader is used for microwave delivery, alongside low-strain 1-mm3 12C diamonds, one of which is placed in a second magnetically insensitive fluorescence-collecting sensor head for common-mode noise cancellation. The magnetometer is capable of detecting signals from sources such as a vacuum pump up to 2 m away, with some orientation dependence but no complete dead zones, demonstrating its potential for use in remote-sensing applications.<br><br>Data record consisting of a zip file. ODMR and time-trace data in .mat form. Test-field measurements and vector analyser data in .csv form. 2023-04-14T00:00:00Z Dataset Dataset 10.82444/warw.33859777.v1 https://figshare.com/articles/dataset/Data_for_Fiber-coupled_Diamond_Magnetometry_with_an_Unshielded_30_pT_sqrt_Hz_sensitivity/33859777 CC BY 4.0