Possible existence of a new type of left-handed materials in coupled ferromagnetic bilayer films
Possible existence of a new type of left-handed materials in coupled ferromagnetic bilayer films
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耦合铁磁双层薄膜中可能存在新型左手材料
DOI:
10.1016/j.jmmm.2005.09.040
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发表时间:
2006-07
影响因子:
2.7
通讯作者:
中科院分区:
文献类型:
--
作者:
On the basis of Landau–Lifshitz–Gilbert (LLG) equation, an anomalous ferromagnetic resonance behavior is demonstrated in detail. Coupling between the magnetic moments produces a 3π/2 phase delay for one of the moments ferromagnetic resonance unusually, thus leads the sign of magnetic susceptibility χ˜=χ′-jχ″to be opposite to that induced by the usual ferromagnetic resonance. Consequently, a left-handed material (LHM) may be formed near the low-frequency side of the resonance. Particularly, a LHM with negative value of real part of permeability only is predicted.
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