Development of high-pressure and high-field ESR system using SQUID magnetometer

► A novel high-pressure and high-field ESR system using SQUID magnetometer. ► Pressure range is up to 1.5 GPa and magnetic field range is up to 5 T. ► ESR is measured very easily and quantitatively with moderate sensitivity. ► Well-established pressure calibration method can be applied. ► Precise pressure dependence measurements were performed for NiSnCl6·6H2O.