Diamond quantum magnetometer with dc sensitivity of < 10 pT Hz${}^{-1/2}$ toward measurement of biomagnetic field

N. Sekiguchi, M. Fushimi, A. Yoshimura +10

We present a sensitive diamond quantum sensor with a magnetic field sensitivity of $9.4\pm 0.1pT/\sqrt{\mathrm{Hz}}$ in a near-dc frequency range of 5 to 100~Hz. This sensor is b…