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| Left-handed materials in magnetized metallic magnetic thin films |
| Wu Rui-xin, Xiao John Q. |
| Department of Electronic Sciences and Engineering, Nanjing University, Nanjing 210093, China; Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA |
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Abstract The authors’ theoretical investigation on the high-frequency response of magnetized metallic magnetic films showed that magnetic films may become left-handed materials (LHMs) near the ferromagnetic resonance frequency of incident waves with right-handed circular polarization (RCP) and linear polarization (LP). The frequency range where LHM exists depends on the waves polarization, the magnetic damping coefficient, and the ferromagnetic characteristic frequency ωm of the film. There also exists a critical damping coefficient αc, above which the left-handed properties disappear completely.
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Received: 31 October 2005
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