Data for : Fiber-coupled Diamond Magnetometry with an Unshielded 30 pT/sqrt(Hz)) sensitivity

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.