Abstract
Quantum sensors based on solid-state spins have advanced rapidly over the prior decade, but deploying these sensors in real-world applications remains technically challenging. By introducing an innovative oscillator-based sensor architecture, and employing a ferrimagnetic material rather than the paramagnetic spin defects more commonly studied, this work details the construction of a compact magnetometer with a minimum sensitivity of 100 fT/\ensuremath{\surd}Hz. The sensor's architecture offers advantages in dynamic range, simplicity, and compactness---qualities that may enable widespread use of solid-state quantum sensors outside a laboratory environment.
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