NDLI: Towards electromagnetic metamaterial: Negative permeability spectra of YIG composite materials

Content Provider	IEEE Xplore Digital Library
Author	Tsutaoka, T. Kinoshita, H. Kasagi, T. Yamamoto, S. Hatakeyama, K.
Copyright Year	2013
Description	Author affiliation: Grad. Sch. of Educ., Hiroshima Univ., Higashi-Hiroshima, Japan (Tsutaoka, T.; Kinoshita, H.) \|\| Tokuyama Coll. of Technol., Shunan, Japan (Kasagi, T.) \|\| Grad. Sch. of Eng., Univ. of Hyogo Syosha, Himeji, Japan (Yamamoto, S.; Hatakeyama, K.)
Abstract	Yttrium Iron Garnet (YIG) granular composite materials in the high particle content show negative permeability spectra under external magnetic field in the microwave range. In this study, the complex permeability spectra $(μ_{r}$ = $μ_{r}'$ - $jμ_{r}")$ of 56.2 vol.% YIG composite under external dc field have been analyzed using a permeability dispersion formula having the domain wall (DW) vibration and the gyromagnetic spin rotation susceptibilities, $χ_{d}$ and $χ_{s}.$ Frequency dispersion parameters of the DW and spin resonances were evaluated. With increasing dc external field, static susceptibility of the two components decreases and the resonance frequencies shift toward higher frequency range. The DW resonance contributes to the negative permeability as well as the spin resonance up to about 600 Oe. Above 600 Oe, DW contribution becomes very small; spin resonance contribution becomes dominant. The variation of the maximum frequency in the imaginary part of susceptibilities with damping factors has fairly good agreement with the theoretical calculation.
Starting Page	380
Ending Page	385
File Size	1777320
Page Count	6
File Format	PDF
ISBN	9781479904082
ISSN	21581118
e-ISBN	9781479904105
DOI	10.1109/ISEMC.2013.6670442
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-08-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Permeability Resonant frequency Magnetic fields Dispersion Damping Frequency-domain analysis Composite materials
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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