Magnetic and microwave properties of glass-coated amorphous ferromagnetic microwires

Di, Yongjiang; Jiang, Jianjun; Du, Gang; Tian, Bo; Bie, Shaowei; He, Huan

doi:10.1016/s1003-6326(07)60276-3

Cited by 29 publications

(9 citation statements)

References 15 publications

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“…This is consistent with the observation of significant enhancement of conductivity ( Fig. 4(a)) due to strong magnetostatic interactions among wires and their high magnetoelastic energy [15]. The reason behind the improved field-dependence of permittivity in Fig.…”

Section: Influence Of Wire Lengthsupporting

confidence: 91%

Dielectric properties of composites containing melt-extracted co-based microwires

Luo¹,

Qin

Liu

et al. 2016

Composites Communications

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We have investigated the microwave properties of epoxy-based composites containing meltextracted Co 69.25 Fe 4.25 B 13.5-x Si 13 Nb x (x=0, 1, 3) microwires of various length annealed using a so-called combined current-modulation annealing (CCMA) technique. The observation of a double-peak feature in the permittivity spectra is believed due to the coexistence of the amorphous phase and a small amount of nanocrystallites on the wires with a high Nb content.CCMA was found to be favorable for a better-defined circular anisotropy of microwires and had suppressed the high-frequency peak due to residual stress relief for the composite with 25 mm long wires. Neither the shift of resonance peak nor the characteristic double peak feature was detected for composites containing as-cast 15 or 35 mm long microwires.

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Section: Influence Of Wire Lengthsupporting

confidence: 91%

Dielectric properties of composites containing melt-extracted co-based microwires

Luo¹,

Qin

Liu

et al. 2016

Composites Communications

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“…2(c)) that is likely due to the long-range dipolar interactions between the microwires. 12,26 Moreover, as seen in Fig. 2(c), at a higher frequency range, multi-peak absorption of composites with 3 mm spaced parallel wires remains due to strong skin effect and eddy current that warrant strong wire interactions.…”

mentioning

confidence: 94%

“…As is known, Fe-based wires have significantly different domain structure from Co-based wires arising from the positive magnetostriction and, as a consequence, its static and dynamic electromagnetic responses are also distinct from those of Co-based wires. 1,12 In addition, as compared to Co-based wires, Fe-based wires are cost-effective and therefore more desirable for practical applications, 4 especially in sensors and transformers. On the other hand, it should be noted that the electromagnetic (EM) properties of such microwire composites are dependent not only on the mesostructure, such as the wire-spacing, but also on the local properties of microwires such as the geometry and composition.…”

mentioning

confidence: 99%

Fe-based ferromagnetic microwires enabled meta-composites

Luo

Peng

Qin

et al. 2013

Applied Physics Letters

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The microwave properties of polymer-based glass fiber reinforced composites containing amorphous Fe77Si10B10C3 microwires in parallel and orthogonal arrays and their dependencies on external magnetic field have been investigated. Double-negative-index characteristics are confirmed for both wire arrays through the observed transmission window in the 1–7 GHz frequency band. The microwave interaction within inter-wire range is responsible for a multi-peak feature observed in the absorption spectra of the parallel wire array composite when the wire spacing is below 7 mm. We introduce the term of “effective diameter” associated with the microwire domain structure to remedy the discrepancy between the computed and experimentally observed plasma frequency.

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“…This is due to the interaction effect of the long-range dipolar resonance (LRDR) between the Co-based wires because the 3 mm wire spacing is below the critical spacing. 12,25 Interestingly, the LRDR peaks in the absorption spectrum shift to the red with increasing fields (Fig. 2(i)).…”

Section: Continuous Hybrid Composites Containing 3 MM Spaced Co-basedmentioning

confidence: 92%

Microwires enabled metacomposites towards microwave applications

Luo¹,

Qin²,

Scarpa³

et al. 2016

Journal of Magnetism and Magnetic Materials

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General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Abstract:The work describes the microwave behavior of polymer composites containing parallel Febased and continuous/short-cut Co-based microwire arrays. A magnetic field-tunable metacomposite feature has been identified in the hybrid microwires composite containing 3 mm spaced Co-based wires and confirmed by the presence of transmission windows in the frequency band of 1 to 3.5 GHz. The magnetically tuned redshift-blueshift in the transmission window is due to the competing dynamic interactions between the different wires and the ferromagnetic resonance of the Fe-based microwires. When the Co-based inter-wire spacing is increased to 10 mm, dual-band transmission windows in the 1.5-3.5 GHz and 9-17 GHz bandwidths were observed. These transmission windows are likely induced by the ferromagnetic resonance of Fe-based wires and the long range dipolar resonance arising between Fe-Co wire couples. The hybridization of parallel Fe-based and short Co-based wires in the composites leads to a significant enhancement of the transmission window in the 1 to 6 GHz band due to the band-gap nature of the Co-based wires. The hybrid metacomposites containing microwires seem attractive in radio frequency identification application.

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Magnetic and microwave properties of glass-coated amorphous ferromagnetic microwires

Cited by 29 publications

References 15 publications

Dielectric properties of composites containing melt-extracted co-based microwires

Dielectric properties of composites containing melt-extracted co-based microwires

Fe-based ferromagnetic microwires enabled meta-composites

Microwires enabled metacomposites towards microwave applications

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