Comparison of noise floor and sensitivity for different magnetoelectric laminates

摘要

We present a comparison of the magnetoelectric (ME) response and magnetic-field sensitivities of engineered laminate sensors comprised of magnetostrictive and piezoelectric phases. The ME voltage coefficients for Metglas and single crystal fibers of Pb(Mg_(1/3)Nb_(2/3))O_3-PbTiO_3 (PMN-PT) or Pb(Zn_(1/3)Nb_(2/3))O_3-PbTiO_3 (PZN-PT) are about 2.8 times larger than those with Metglas-Pb(Zr,Ti)O_3 (PZT) ceramic ones. This results in a 1.7 times enhancement in the magnetic-field sensitivity for the structures with single crystals. Accordingly, the noise floors are about three to four times lower for composites with PMN-PT or PZN-PT fibers than those with PZT.