Magnetic-Field Sensitivity Enhancement by Magnetoelectric Sensor Arrays

We have investigated an array of magnetoelectric (ME) detection sensor units and an equivalent scheme by which to model their magnetic-field detection sensitivity. The signal response, noise level, and signal-to-noise ratio (SNR) of an array of m units connected in parallel and serial modes have been analyzed. Our research shows that ME arrays in parallel increase the signal and noise currents by factors of m and radicm, respectively, while ME arrays in series do not increase the signal current but reduce the noise by radicm. Accordingly, we predict and experimentally confirm that the SNR increases by a factor of radicm, for both serial and parallel modes.

[1]  A. V. Carazo,et al.  Magnetoelectric Properties in Piezoelectric and Magnetostrictive Laminate Composites , 2001 .

[2]  G. Srinivasan,et al.  Resonance magnetoelectric effects in layered magnetostrictive-piezoelectric composites , 2003, cond-mat/0306513.

[3]  C. Nan,et al.  Magnetoelectric effect in composites of piezoelectric and piezomagnetic phases. , 1994, Physical review. B, Condensed matter.

[4]  Lawrence E. Crooks,et al.  Noise reduction techniques in electronic systems (2nd ed.), Henry W. Ott. Wiley‐Interscience, New York. 1988 , 1989 .

[5]  Jr. W.M. Leach,et al.  Fundamentals of low-noise analog circuit design , 1994, Proc. IEEE.

[6]  R. Ramesh,et al.  Epitaxial BiFeO3 Multiferroic Thin Film Heterostructures , 2003, Science.

[7]  Dwight D. Viehland,et al.  Extremely low frequency response of magnetoelectric multilayer composites , 2005 .

[8]  Dwight D. Viehland,et al.  Modeling and detection of quasi-static nanotesla magnetic field variations using magnetoelectric laminate sensors , 2007 .

[9]  Manfred Fiebig.  Revival of the Magnetoelectric Effect , 2005 .

[10]  D. Viehland,et al.  Modeling and the signal-to-noise ratio research of magnetoelectric sensors at low frequency , 2007 .

[11]  Frequency dependence of magnetoelectric interactions in layered structures of ferromagnetic alloys and piezoelectric oxides , 2003, cond-mat/0307208.

[12]  J. A. Connelly,et al.  Low noise electronic system design , 1993 .

[13]  S. Dong,et al.  Resonant bending mode of Terfenol-D∕steel∕Pb(Zr,Ti)O3 magnetoelectric laminate composites , 2006 .

[14]  Henry W. Ott,et al.  Noise Reduction Techniques in Electronic Systems , 1976 .