High sensitivity face shear magneto-electric composite array for weak magnetic field sensing

Authors

Yun LuFollow
Zhenxiang Cheng, University of WollongongFollow
Jianguo Chen
Weihua Li, University of WollongongFollow
Shujun Zhang, University of WollongongFollow

RIS ID

145460

Publication Details

Lu, Y., Cheng, Z., Chen, J., Li, W. & Zhang, S. (2020). High sensitivity face shear magneto-electric composite array for weak magnetic field sensing. Journal of Applied Physics, 128 (6),

Abstract

© 2020 Author(s). A magnetic field sensor is designed and fabricated using a piezoelectric face shear mode Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT)/Metglas magneto-electric (ME) composite. An outstanding ME coupling coefficient up to 1600 V/(cm Oe) was experimentally achieved, being ∼50% higher than the value from the extensional PMN-PT/Metglas ME composite with the same volume. The detection limit was found to be 2 × 10-6 Oe for the DC magnetic field, while it was 2 × 10-8 Oe for the AC magnetic field. The sensitivity of the face shear mode PMN-PT/Metglas ME composite is about one order of magnitude higher than that of a 32 extensional mode PMN-PT/Metglas based ME composite in sensing a weak DC magnetic field. A sensing array was also designed based on the ME composite to image weak DC magnetic fields, demonstrating a great potential promising for sensing weak magnetic fields.