| Left-handed materials in magnetized metallic magnetic thin films |
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| 作者姓名： | 伍瑞新 XIAO John Q. |
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| 作者单位： | 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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| 基金项目： | Project supported by the National Basic Research Program (973) ofChina (No. 2004CB719805) and the National Natural Science Foun-dation of China (No. 60471020) |
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| 摘 要： | INTRODUCTION Veselago (1968) showed that if both the permit- tivity ε and the magnetic permeability μ of a material are negative, the propagation direction of an elec- tromagnetic (EM) wave will be opposite to its energy flow direction. Such media are called left-handed materials (LHMs) since the electric field E, magnetic field H, and wave vector k in these media form a left-hand triplet of vectors, instead of a right-hand triplet observed in conventional materials. For a long time, …
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| 关 键 词： | 左旋材料 磁性薄膜 铁磁谐振频率 LHMs |
| 收稿时间： | 2005-10-31 |
| 修稿时间： | 2005-11-15 |
Left-handed materials in magnetized metallic magnetic thin films |
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| Rui-xin Wu,John Q. Xiao.Left-handed materials in magnetized metallic magnetic thin films[J].Journal of Zhejiang University Science,2006,7(1):71-75. |
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| Authors: | Rui-xin Wu John Q Xiao |
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| Institution: | (1) Department of Electronic Sciences and Engineering, Nanjing University, Nanjing, 210093, China;(2) 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 ω
m of the film. There also exists a critical damping coefficient α
c, above which the left-handed properties disappear completely.
Project supported by the National Basic Research Program (973) of China (No. 2004CB719805) and the National Natural Science
Foundation of China (No. 60471020) |
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| Keywords: | Left-handed materials (LHMs) Magnetic thin film Ferromagnetic resonance frequency |
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