Field/stress tunable behaviour of composites containing the combined current-modulation annealed ferromagnetic microwires

Y. Luo, F. Scarpa, F. Qin, J. Liu, H. Wang, C. Brosseau, D. Xing, J. Sun, H. Peng

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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Abstract

Polymer composites containing melt-extracted (MET) ferromagnetic microwires have demonstrated excellent sensing capabilities to magnetic bias or mechanical stress.<sup>1</sup>,<sup>2</sup> We have introduced an alternate/pulse current combined-modulation annealing (CCMA) to optimise the domain structure of MET wires and enhance their giant magnetoimpedance (GMI) response significantly as compared to conventional annealing techniques.<sup>3</sup> Also, it has been confirmed that topological factors such as wire length play a crucial role in determining the electromagnetic (EM) properties of the wire-composites.<sup>4</sup> Herein, we present the field/stress tunable features of microwave behaviour of epoxy-based composites containing CCMA-ed Co-based microwires of different lengths so as to look into the effects of the CCMA. A decrease-increase trend of permittivity (ε) spectra is revealed in the CCMA-ed wires composites in presence of magnetic fields. A linear positive stress-ε dependency is shown in the composite containing 25 mm CCMA-ed wires.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781479973224
DOIs
Publication statusPublished - 14 Jul 2015
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 11 May 201515 May 2015

Conference

Conference2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period11/05/1515/05/15

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