Magnetoelectric Characteristics on Layered Fe₇₈B₁₃Si₉/PZT/Fe₇₈B₁₃Si₉Composites for Magnetic Field Sensor

Abstract

The magnetoelectric characteristics on layered Fe 78 B 13 Si 9 /PZT and Fe 78 B 13 Si 9 /PZT/Fe 78 B 13 Si 9 (t m =0.017, 0.034 mm) composites by epoxy bonding for magnetic field sensor were investigated in the low-frequency range and resonance frequency range. The optimal bias magnetic field H dc of these samples was about 23~63 Oe range. The Me coefficient of Fe 78 B 13 Si 9 /PZT/Fe 78 B 13 Si 9 (t m =0.034 mm) composites reaches a maximum of 186 mV/cm·Oe at H dc =63 Oe, f=50 Hz and a maximum of 1280 mV/cm·Oe at H dc =63 Oe, resonance frequency f r =95.5 KHz. The output voltage shows linearity proportional to ac fields H ac and is about U=0~130.6 mV at H ac =0~7 Oe, f=50 Hz, U=0~12.4 V at H ac =0~10 Oe, f r =95.5 KHz(resonance frequency). The optimal frequency(f=50 Hz) of this sample is around the utility ac frequency(f=60 Hz). Therefore, this sample will allow for ac magnetic field sensor at utility frequency and low bias magnetic fields H dc . Received : May. 13, 2015, Accepted : May. 27, 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/ licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.