Contactless Induction Method for Electric Resistivity Measurement
作者:
Aleksander Z. Chaberski,
期刊:
Journal of Applied Physics
(AIP Available online 1971)
卷期:
Volume 42,
issue 3
页码: 940-947
ISSN:0021-8979
年代: 1971
DOI:10.1063/1.1660190
出版商: AIP
数据来源: AIP
摘要:
A new absolute method is developed for measuring electric resistivity in the range of 10−8to 10+8&OHgr; cm of a sample of almost arbitrary shape. This method takes into account the effect of self‐induced conduction and polarization current. Measurements are made with the specimen placed in a constant rotating magnetic field in such an orientation that it experiences maximum torque and has minimum moment of inertia. This can be shown to be the same orientation for which, if the specimen were free to rotate, it would reach the angular velocity of the rotating field in minimum time. This method is applicable to homogeneous and isotropic conducting materials in both solid and liquid states, including ferromagnetic substances. The mathematical formula for the measured torque is developed and the technique for measuring electric resistivity is explained.
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