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A New Method to Increase the Magnetoelectric Voltage Coefficients of Metglas/PVDF Laminate Composites

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Abstract

The magnetic flux density inside a Metglas sheet is much higher than that of the applied external magnetic field due to its high magnetic permeability, which is known as the magnetic flux concentration effect. Magnetic flux concentration of Metglas as a function of its sheet aspect ratio (width/length) was investigated for Metglas/Polyvinylidene fluoride (PVDF) laminar composites. Both the simulations and experimental results suggest that the magnetic flux concentration effect is markedly enhanced when the aspect ratio of a Metglas sheet is reduced. Consequently the magnetostriction of Metglas and the magnetoelectric (ME) voltage coefficients of the laminar composites are enhanced. The ME voltage coefficient for a laminar composite with a 1 mm wide and 30 mm long Metglas sheet (25 /µm thick) is 21.46 V/cm·Oe, which is much higher than those reported earlier in similar laminar composites without making use of the flux concentration effect. The results demonstrate an effective means to significantly enhance the sensitivity of the magnetostrictive/piezoelectric composites as weak magnetic field sensors.

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Acknowledgments

This work was financially supported by NSF under grant No. ECCS-0824202.

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Authors and Affiliations

  1. Department of Electrical Engineering, The Pennsylvania State University, University Park, PA, 16802, U.S.A.

    Zhao Fang, Ninad Mokhariwale & Qiming Zhang

  2. Materials Research Institute, The Pennsylvania State University, University Park, PA, 16802, U.S.A.

    Zhao Fang, Shengguo Lu, Ninad Mokhariwale & Qiming Zhang

  3. LPA-GBMI, Faculty of Sciences II, Department of Physics, Lebanese University, P.O. Box 90656, Jdeidet, Lebanon

    Mario El Tachchi

Authors
  1. Zhao Fang
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  2. Shengguo Lu
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  3. Ninad Mokhariwale
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  4. Mario El Tachchi
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  5. Qiming Zhang
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Fang, Z., Lu, S., Mokhariwale, N. et al. A New Method to Increase the Magnetoelectric Voltage Coefficients of Metglas/PVDF Laminate Composites. MRS Online Proceedings Library 1199, 103–108 (2009). https://doi.org/10.1557/PROC-1199-F06-08

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  • DOI: https://doi.org/10.1557/PROC-1199-F06-08

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