Highly Sensitive Magnetic Sensor based on Magnetoelectric Effect and Cross-Modulation Technique
Authors : Cunzheng Dong, Yifan He, Xianfeng Liang, Huaihao Chen, Yuyi Wei, Nian Xiang Sun
Publication date : 2019
Journal : APS March Meeting Abstracts
Description:
State of the art bulk magnetoelectric (ME) sensors composed of Metglas/PMN-PT fiber structures have been demonstrated to exhibit a low limit of detection (LOD) of 10 pT at 1 Hz. Because of the low cost and compact size, the ME magnetic field sensor has become competitive to other sensing technologies for applications demand for high sensitivity. The magnetic noise of ME sensors is the key parameter that results from the internal and external noise sources. To reduce the noise level, an active operation mode has been proposed. However, active ME sensors usually show a high magnetic noise over 200 pT/Hz at 1 Hz in the reports. Here, we demonstrate an ultra-sensitive ME sensors based on Metglas/PZT fiber heterostructuers operating at the complete demagnetized state of Metglas. A strong correlation was observed between the limit of detection and the degree of demagnetization of Metglas in the ME …
Publication: APS March Meeting 2019, abstract id.Y39.006
Pub Date: 2019 Bibcode: 2019APS..MARY39006D
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