Abstract
We report theoretically and experimentally the simultaneous realization of high detection sensitivity and high ambient noise rejection in an intrinsic gradiometer based on the giant magnetoelectric effect and the magnetic field gradient sensing technique in two specifically designed and arranged magnetoelectric magnetometers. The output voltage of the gradiometer is directly obtained from the intrinsic difference voltage between the two magnetoelectric magnetometers and is calibrated magnetic field gradient to give a high detection sensitivity of 3.2 mV/(Oe/m) and a high ambient noise rejection of 30 dB (equivalent to a noise level of 20 pT/√Hz at the natural resonance frequency of 120 kHz). The consistent characteristics of the magnetoelectric magnetometers result in almost zero non-linearity between the gradiometer output voltage and its magnetic field gradient over a broad range of frequency from 1 Hz to 170 kHz.
Original language | English |
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Title of host publication | IEEE Sensors, SENSORS 2016 - Proceedings |
Publisher | IEEE |
ISBN (Electronic) | 9781479982875 |
DOIs | |
Publication status | Published - 5 Jan 2017 |
Event | 15th IEEE Sensors Conference, SENSORS 2016 - Convention Center at the Caribe Royale Hotel, Orlando, United States Duration: 30 Oct 2016 → 2 Nov 2016 |
Conference
Conference | 15th IEEE Sensors Conference, SENSORS 2016 |
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Country/Territory | United States |
City | Orlando |
Period | 30/10/16 → 2/11/16 |
Keywords
- ambient noise rejection
- intrinsic gradiometer
- magnetic field gradient
- magnetoelectric effect
- magnetometer
ASJC Scopus subject areas
- Electrical and Electronic Engineering