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Title: Control of Gilbert damping using magnetic metamaterials
Authors: Mitsumata, Chiharu
Tomita, Satoshi
Issue Date: 18-Nov-2011
Publisher: American Physical Society
Volume: 84
Issue: 17
Article Number: 174421
Abstract: We studied, from a theoretical standpoint, the Landau-Lifshitz-Gilbert equation of magnetic metamaterials consisting of magnetic nanoparticles. The dynamics of the metamaterials magnetization was numerically investigated in order to elucidate the mechanism of Gilbert damping. Our results revealed that the interacting dipole field synchronized to the magnetization precession causes the variation in the effective Gilbert damping factor. Nevertheless, we found that a metamaterial with a specific structure has almost the identical effective Gilbert damping factor, although the interacting dipole field increases. This work demonstrates that the effective Gilbert damping factor can be analytically predicted and designed using the structure factors in magnetic metamaterials, opening an avenue to a new relationship between metamaterials and spintronics.
ISSN: 1098-0121
Rights: Copyright (C) 2011 American Physical Society.
Text Version: publisher
Publisher DOI: 10.1103/PhysRevB.84.174421
Appears in Collections:物質創成科学研究科 / Graduate School of Materials Science

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