Abstract
The shielding of a polarized electromagnetic pulse by a ferromagnetic thin film is calculated in the case where the magnetization is perpendicular to the incident field's polarization. The effects of anisotropy, domain interaction, saturation, hysteresis, and magnetization response time are considered. Results show that best shielding occurs when the response time of the ferromagnetic film is the inverse of the rise time of the pulse. At its optimum frequency, a ferromagnetic alloy shields better than a copper film of the same thickness.
Keywords
domain interaction, saturation, copper films, ferromagnetic alloy
Subject Categories
Thin films, Ferromagnetism, Magnetization, Electromagnetic pulse, Anisotropy, Hysteresis
Disciplines
Electromagnetics and photonics
Publisher
American Institute of Physics
Publication Date
4-1-1989
Rights Information
Copyright 1989 American Institute of Physics.
Rights Holder
American Institute of Physics
Permanent URL
Recommended Citation
Zayek, F.; McKnight, S. W.; Vittoria, C.; Folen, V.; and Maisch, W., "Effects of magnetic-relaxation times on the shielding of a polarized electromagnetic pulse" (1989). Electrical and Computer Engineering Faculty Publications. Paper 38. http://hdl.handle.net/2047/d20002208
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Notes
Originally published in Journal of Applied Physics 65, 2803 (1989). DOI:10.1063/1.342743 (http://dx.doi.org/10.1063/1.342743).