Development of magnetization measurement under high pressure and pulsed high magnetic field

A method for measuring magnetization under high pressure and pulsed high magnetic field was developed for a Drickamer-type cell using diamond anvils and an insulator gasket. As the first test, the magnetization of invar alloy Fe0.65Ni0.35 was measured at room temperature up to 8 GPa in a pulsed field of 10 T with a width of 4 ms. The magnetization decreased with increasing pressure, indicating a transition to a paramagnetic state at 5–6 GPa, in accordance with the results of previous experiments using conventional methods such as ac susceptibility measurement.