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.
|Title of host publication||2015 IEEE International Magnetics Conference, INTERMAG 2015|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Publication status||Published - 14 Jul 2015|
|Event||2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China|
Duration: 11 May 2015 → 15 May 2015
|Conference||2015 IEEE International Magnetics Conference, INTERMAG 2015|
|Period||11/05/15 → 15/05/15|