Broadband ferromagnetic resonance of micron-scale iron wires using rectifying effect

Y. Kasatani; A. Yamaguchi; H. Miyajima; Y. Nozaki

doi:10.1109/TMAG.2011.2106115

Broadband ferromagnetic resonance of micron-scale iron wires using rectifying effect

Y. Kasatani, A. Yamaguchi, H. Miyajima, Y. Nozaki

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The broadband ferromagnetic resonance study on both the single crystalline and polycrystalline Fe wires were performed using the rectifying effect. The effective Gilbert damping in the polycrystalline Fe wire was about three times larger than that in the single crystalline wire. This is attributed to the enhancement of the energy dissipation due to the incoherent rotation of the magnetization at the grains and grain boundaries in the polycrystalline wire. The difference between the experimental data and analytical calculation can be explained by the strong magnetic shape anisotropy that overcomes the external static magnetic field and forces the magnetization to be directed along the wire axis.

Original language	English
Article number	5772192
Pages (from-to)	1587-1590
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	6 PART 1
DOIs	https://doi.org/10.1109/TMAG.2011.2106115
Publication status	Published - 2011 Jun 1

Keywords

Crystalline materials
iron
magnetic resonance
microwave magnetics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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AB - The broadband ferromagnetic resonance study on both the single crystalline and polycrystalline Fe wires were performed using the rectifying effect. The effective Gilbert damping in the polycrystalline Fe wire was about three times larger than that in the single crystalline wire. This is attributed to the enhancement of the energy dissipation due to the incoherent rotation of the magnetization at the grains and grain boundaries in the polycrystalline wire. The difference between the experimental data and analytical calculation can be explained by the strong magnetic shape anisotropy that overcomes the external static magnetic field and forces the magnetization to be directed along the wire axis.

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