Noise and scale effects on the signal-to-noise ratio in magnetoelectric laminate sensor/detection units

被引：29
|
作者：
Xing, Zengping [1 ]
Li, Jiefang [1 ]
Viehland, D. [1 ]
机构：
[1] Virginia Tech, Blacksburg, VA 24061 USA
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 18期
关键词：
D O I：
10.1063/1.2804118
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We have investigated the output noise level (E-no) and signal-to-noise ratio (SNR) for various magnetoelectric (ME) laminate composites. Our findings show (i) that E-no is nearly independent of materials couple or operational mode and practically determined by the laminate capacitance C and (ii) that the SNR has a scale effect, where it is limited by the volume (V) of the piezoelectric layer. Relations between SNR, V, and the magnetoelectric coefficient (alpha ME) give insights into how to construct ME sensors with enhanced sensitivity to small magnetic variation. (C) 2007 American Institute of Physics.
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页数：3
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