Fig. 1. Principle schematic of alkali-metal atomic magnetometer

Fig. 2. Schematic diagram of the designed SERF rubidium atomic magnetometer

Fig. 3. Magnetic resonance curve when B0 is 25 nT

Fig. 4. Resonant frequencies and half-widths of atomic magnetic resonance curves with different external magnetic field strengths

Fig. 5. Contour map of theoretical sensitivity (fT/Hz1/2) of magnetic field with different frequencies varies with ROP and Rpr. (a) Direct current; (b) 220 Hz

Fig. 6. (a) Amplitude-frequency response curve of magnetometer; (b) noise spectral densities of magnetometer

Fig. 7. Schematic diagram of liquid-state zero-field NMR experiment device

Fig. 8. Timing sequence for a zero-field NMR measurement

Fig. 9. (a) Change of integral of zero-field NMR spectral peak of formic acid with pulse width; (b) NMR spectrum when pulse width is 0.36 ms