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Thermal stability of magnetoelectric sensors

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5 Author(s)
Ying Shen ; Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061, USA ; Gao, Junqi ; Wang, Yaojin ; Li, Jiefang
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The effect of temperature on the equivalent magnetic noise floor of Metglas-Pb(Zr,Ti)O3 (PZT) laminate magnetoelectric (ME) sensors has been investigated in the temperature range of -50 °C to 50 °C. In detail, the parameters that control the noise floor of ME sensors, such as capacitance, tan δ, and ME charge coefficient, were characterized. The results show the noise floor was thermally stable around 30 pT/√Hz (f = 1 Hz) over the studied temperature range. To demonstrate the relative invariance of ME sensor at different temperatures over the range studied, a simulation based on a noise model was conducted, where the predicted and measured equivalent magnetic noise floors were found to well agree.

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Applied Physics Letters  (Volume:100 ,  Issue: 17 )