Eur. Phys. J. Appl. Phys.
Volume 52, Number 1, October 2010
|Number of page(s)||6|
|Section||Spintronics, Magnetism and Superconductivity|
|Published online||17 September 2010|
Impedance analysis of circular coils on double-structured axisymmetrical cylinders with different conductivities and permeabilities
Institute of Fluid Science, Tohoku University, 2-1-1 Katahira, Aoba-ku, 980-8577, Sendai, Japan
Corresponding author: firstname.lastname@example.org
Accepted: 30 June 2010
Published online: 17 September 2010
We analytically formulate electromagnetic fields of circular loop-coils placed around double-structured axisymmetrical cylinders with different electrical conductivities and magnetic permeabilities. Formulae are given in terms of conductivity, permeability and frequency in a vector potential formalism subject to the appropriate boundary conditions on the cylindrical surface. The impedance of the coil is numerically computed for real and imaginary parts, whose behavior is investigated in detail on the Gauss plane for various electromagnetic properties. Our model will make it clear how the impedance of the coil depends on the conductivity and permeability in subregion of the base material, and also on the excitation frequency.
© EDP Sciences, 2010
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