Phase-sensitive dc magnetometer based on magnetic-electromagnetic-magnetostrictive-piezoelectric heterostructure

Mingji Zhang, Siu Wing Or

Research output: Journal article publicationJournal articleAcademic researchpeer-review

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Abstract

A phase-sensitive dc magnetometer is developed by combining a pair of permanent magnets, an electromagnetic coil, and a magnetostrictive-piezoelectric laminate in one direction to form a four-phase magnetic-electromagnetic-magnetostrictive-piezoelectric heterostructure. The dc magnetic field sensing in the magnetometer is based on the detection of the phase difference between the off-resonance magnetoelectric voltage manipulated by the dc magnetic field to be measured and the resonance electric current referenced at zero dc magnetic field, both under a preset bias magnetic field. The theoretical and experimental results confirm a high and linear dc magnetic field sensitivity of -0.21 °/Oe over a positive and negative dc magnetic field range of ±150 Oe with a small nonlinearity of 1.7%. The magnetometer has the ability to determine dc magnetic field direction and its sensitivity is independent of zero-field resonance electric current amplitude.
Original languageEnglish
Article number056642
JournalAIP Advances
Volume7
Issue number5
DOIs
Publication statusPublished - 1 May 2017

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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