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Title: Negative permeability of magnetic nanocomposite films for designing left-handed metamaterials
Authors: Mitsumata, Chiharu
Tomita, Satoshi
Issue Date: 26-Nov-2007
Publisher: American Institute of Physics
Volume: 91
Issue: 22
Article Number: 223104
Abstract: We have theoretically evaluated magnetic permeability of Ni nanocomposite films, in which the dipolar interactions between the Ni particles are considered explicitly. A numerical model of the nanocomposite is constructed according to our recent experimental results and a micromagnetic calculation is conducted. We show that the value of permeability strongly depends on the volume fraction and randomness of the particles. Particularly, as the randomness of the particles increases, the negative value of permeability drastically shrinks. However, the region of applied field, where the permeability is negative, becomes broader. This is advantageous for the broadband left-handed metamaterials in microwave regions. © 2007 American Institute of Physics.
ISSN: 0003-6951
Rights: Copyright (C) 2007 American Institute of Physics.
Text Version: publisher
Publisher DOI: 10.1063/1.2816894
Appears in Collections:物質創成科学研究科 / Graduate School of Materials Science

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