Design of a Low Temperature Translation Balance for the Measurement of Paramagnetic and Diamagnetic Susceptibilities

摘要

A modified Foex and Forrer Translation Balance has been designed for measuring the paramagnetic and diamagnetic properties of materials over the temperature range 77-300 exp 0 K. The systems' temperature range can eventually be extended to 4.2 exp 0 K. The apparatus incorporates a vertical Dewar of Standard variety in addition to a horizontal Dewar for cooling the sample holder and adjacent horizontal supports. The design also allows for the placement of a thermocouple junction in direct contact with a sample. The balance sensitivity, defined as the change in displacement per unit applied force, is 0.0044 cm/dyne. The precision of the balance is +- .5% with an accuracy of 1.5%. (ERA citation 04:055457)