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Theoretical and experimental study on magnetoelectric effect in laminated composites of magnetostrictive and piezoelectric materials with finite input impedance

Bao Bing-Hao Luo Ying

Theoretical and experimental study on magnetoelectric effect in laminated composites of magnetostrictive and piezoelectric materials with finite input impedance

Bao Bing-Hao, Luo Ying
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  • Received Date:  12 March 2010
  • Accepted Date:  27 April 2010
  • Published Online:  15 January 2011

Theoretical and experimental study on magnetoelectric effect in laminated composites of magnetostrictive and piezoelectric materials with finite input impedance

  • 1. (1)Micro-Nano Science and Technology Research Center, Jiangsu University, Zhenjiang 212013, China; (2)School of Science, Jiangsu University, Zhenjiang 212013, China

Abstract: Combining the motion equation with the constitutive equations of the magnetostrictive and piezoelectric materials and considering the influence of the finite input impedance of the capacitance of coaxial cable and the measuring instrument on output voltage produced by magnetoelectric element, the theoretical formula of magnetoelectric voltage sensitivity was derived. A sandwich structureed magnetoelectric element consisting of one-dimensional terfenol-D thin bars and transversely polarized Pb(Zr1-xTix)O3 piezoelectric materials was developed. The property of the element was tested also. The theoretical results are in better agreement with the experimental after taking account of the finite input impedance. The theoretical results show that the magnetic sensitivity of the magnetoelectric element at lower excitation frequency and with finite input impedance is about 150 mV/Oe, while the magnetic sensitivity in open circuit situation is about 290 mV/Oe.

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