Magnetic Measurements under Hydrostatic Pressure: Intensity of Magnetization and Anisotropy

Abstract

A new technique was developed to make magnetic observations of weakly magnetized materials under hydrostatic pressure up to 12 kilobars in a wide temperature range from liquid helium temperature up to 200°C. We have designed a special type of nonmagnetic pressure vessel in which the materials to be measured were pressurized. For measuring magnetization, the above pressure vessel was connected to a torsion pendulum and its deflection in a magnetic field was measured. For measuring the anisotropy of ferromagnetic crystals, the vessel was connected to an air-jet supported magnetometer having an unbonded strain gauge detector and its torque moment in a uniform magnetic field was determined.