AC/DC dual-mode magnetoelectric sensor with high magnetic field resolution and broad operating bandwidth

AC/DC dual-mode magnetoelectric sensor with high magnetic field resolution and broad operating bandwidth

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In this study, a dual-mode Metglas/Pb(Zr,Ti)O3 magnetoelectric (ME) sensor was prepared for measuring weak magnetic fields.It is interesting to note that this ME sensor can work at alternating current (AC) and direct current (DC) dual-modes with high field resolution.In AC mode, a very accurate click here AC magnetic field resolution of 0.

8 nT was achieved at a mechanical resonance frequency of 72.2 kHz; moreover, the operating frequency band for resolution better than 1 nT is as wide as 3.4 kHz.

We proposed a DC bias field perturbation (DBFP) method to detect the DC magnetic field using lock-in amplifier technology.As a result, an ultra-accurate DC field resolution of 0.9 nT with noise power spectral density as keychron m4 low as 100 pT/Hz was obtained in the studied ME sensor via the DBFP method.

The dual-mode ME sensor enables simultaneous measurement for DC and AC magnetic fields with wideband and accurate field resolution, which greatly enhances the measurement flexibility and application scope.