Pressure dependence of Curie temperature in a selenazyl radical ferromagnet

► By adding the paramagnetic signal, we realized nearly flat temperature dependence of the magnetic signal of a miniature diamond anvil cell. ► We measured AC magnetic susceptibility of C7H5ClN3Se4 up to 4.2 GPa. ► The Curie temperature was once enhanced by applying pressure. ► The ambient pressure value of TC = 17 K was raised to 21 K at 0.9 GPa.