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Geomagnetic sensor based on giant magnetoelectric effect

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5 Author(s)
Junyi Zhai ; Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA ; Shuxiang Dong ; Xing, Zengping ; Li, Jiefang
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Here, the authors report a new type of geomagnetic field sensor based on the giant magnetoelectric effect in Metglas/piezoelectric-fiber laminates that are wrapped with a coil. These sensors can measure quite precisely the value of both the Earth’s magnetic field and its inclination. The geomagnetic field sensor does not require a dc magnetic bias and is driven by a 10 mA ac. Highly sensitive dc magnetic field variations of less than 10-9 T and angular inclinations of ≤10-5 deg can be detected, potentially offering opportunities for a small global positioning device.

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Applied Physics Letters  (Volume:91 ,  Issue: 12 )