Figure 5From: OPM magnetorelaxometry in the presence of a DC bias fieldMeasured OPM frequency response at \(B_{0}=5~\upmu \mbox{T}\) and \(B_{0}=50~\upmu \mbox{T}\). The dotted line indicates the \(-3~\mbox{dB}\) bandwidth at \({\approx}500~\mbox{Hz}\). The data was acquired using a spectrum analyzer and a random-noise-fed pancake coilBack to article page