Title :
Simultaneous measurement of electric and magnetic properties of a spherical sample
Author :
Yamazaki, Sadaai ; Negishi, Teruo ; Nakane, Hiroshi ; Tanaka, Akio
Author_Institution :
Dept. of Electr. Eng., Kogakuin Univ., Tokyo, Japan
fDate :
4/1/1996 12:00:00 AM
Abstract :
A method using a solenoid coil for simultaneously estimating the electric and magnetic properties of a spherical conductor was studied. These properties are estimated by finding the difference in the complex impedance of the coil with and without a sample to find out the measuring 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 a and permeabilities μ measured by this method and by the conventional methods were compared using various samples. The deviations were no larger than 3% for a nonmagnetic samples, and 1.5% for μ of magnetic samples
Keywords :
conductors (electric); eddy currents; electric impedance measurement; electrical conductivity measurement; magnetic permeability measurement; solenoids; complex impedance; eddy currents; electric conductivity measurement; electric properties; magnetic permeability measurement; magnetic properties; magnetic sample; multilayer coil; nonmagnetic sample; simultaneous measurement; solenoid coil; spherical conductor; superconductive spherical sample; Conductivity; Conductors; Electric variables measurement; Impedance measurement; Magnetic properties; Permeability; Solenoids; Superconducting coils; Superconducting magnets; Superconductivity;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
