Title :
The induced magnetic dipole of a polarized sphere
Author :
Wait, James R. ; Debroux, Patrick
Author_Institution :
Univ. of Arizona, Tucson, AZ, USA
fDate :
4/1/1985 12:00:00 AM
Abstract :
A homogeneous spherical body with a frequency dependent complex resistivity is placed in a uniform time varying magnetic field. It is shown that the induced magnetic dipole has a complex form that depends on the ratio of the diameter to the internal skin depth in a customary fashion. But the frequency dependence of the induced dipole is also influenced by the polarization properties of the material. A Cole-Cole form for the complex resistivity is employed to characterize the electrochemical polarization.
Keywords :
Electromagnetic (EM) induction; Geophysical measurements; Spheres; Conductivity; Earth; Frequency dependence; Geophysical measurements; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic separation; Permittivity; Polarization;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.1985.1143586