Center for Energy Harvesting Materials and Systems (CEHMS)

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Browsing Center for Energy Harvesting Materials and Systems (CEHMS) by Author "Avirovik, Dragan"

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    Low-frequency nanotesla sensitivity in Metglas/piezoelectric/carbon fiber/piezoelectric composites with active tip mass
    Park, Chee-Sung; Avirovik, Dragan; Bressers, Scott; Priya, Shashank (AIP Publishing, 2011-02-01)
    We report nanotesla sensitivity in Metglas/piezoelectric/carbon fiber/piezoelectric laminates with active tip mass operating in the vicinity of second bending mode. The peak magnetoelectric response for the laminate with an active tip mass (1 g) in longitudinal-transversal mode under H(dc)=8 Oe and H(ac)=1 Oe was found to be similar to 1.08 V/cm Oe at 43 Hz (first bending mode) and similar to 19 V/cm Oe at 511 Hz (second bending mode). At the standard 1 kHz frequency, the maximum resolution of 5 nT was measured under H(ac)=0.5 Oe. (C) 2011 American Institute of Physics. [doi:10.1063/1.3552970]
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    Tunable magnetoelectric response of dimensionally gradient laminate composites
    Park, Chee-Sung; Avirovik, Dragan; Bichurin, Mirza I.; Petrov, Vladimir M.; Priya, Shashank (AIP Publishing, 2012-05-01)
    A magnetoelectric (ME) sensor exhibiting wideband behavior as a function of applied magnetic DC bias and frequency was designed by combining the dimensionally gradient piezoelectric layer with Metglas magnetostrictive layers in laminate configuration. The ME coefficient of the band in the DC magnetic range of 52-242 Oe was measured to be 3000 mV/cm Oe under the resonant condition of f = 107 kHz. The wideband in the AC magnetic field frequency range of 41-110 kHz had the ME coefficient in the vicinity of 260 mV/cm Oe under the conditions of H-AC = 1 Oe and H-DC = 70 Oe. This frequency-dependent ME behavior clearly showed two different states on each side of the resonance peak which could open the possibility of developing new applications such as magnetic field-controlled switches. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4720095]