SIMULTANEOUS MEASUREMENT OF ELECTRIC AND MAGNETIC-PROPERTIES OF A SPHERICAL SAMPLE

A method using a solenoid coil for simultaneously estimating the elect ric and magnetic properties of a spherical conductor was studied. Thes e properties are estimated by finding the difference in the complex im pedance of the coil with and without a sample to find out the measurin g value that best coincides with the theoretical value, A new formula applicable to a nonmagnetic, a magnetic or a superconductive spherical sample was derived, The conductivities sigma and permeabilities mu me asured by this method and by the conventional methods were compared us ing various samples, The deviations were no larger than 3% for sigma n onmagnetic samples, and 1.5% for mu of magnetic samples.