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

Volume

45

Issue

2

fYear

1996

fDate

4/1/1996 12:00:00 AM

Firstpage

473

Lastpage

477

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.492770

Filename

492770