Passive Sensors Unlimited LLC

King and Queen Court House, VA, United States

Passive Sensors Unlimited LLC

King and Queen Court House, VA, United States
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Wang Y.,Virginia Polytechnic Institute and State University | Gray D.,Virginia Polytechnic Institute and State University | Berry D.,Passive Sensors Unlimited LLC | Gao J.,Virginia Polytechnic Institute and State University | And 3 more authors.
Physica Status Solidi - Rapid Research Letters | Year: 2011

We have experimentally and theoretically investigated the equivalent magnetic noise in a magnetoelectric Metglas/ 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 laminate sensor unit by considering the constituent noise sources of dielectric loss (NDE) and DC leakage resistance (NR). In the low frequency range (f = 1 Hz), theory predicts that NR dominates the noise charge (1.6 times larger than NDE), with a 1 Hz noise of 9.1\;{\rm pt}/\sqrt {\rm Hz}. The experimental equivalent magnetic noise was 10.8\;{\rm pt}/\sqrt {\rm Hz}. This observed value is slightly higher than the predicted one, which might be due to an oversimplification of the theoretical model in terms of electrical charge amplifier and external vibration noise sources. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Wang Y.,Virginia Polytechnic Institute and State University | Gray D.,Virginia Polytechnic Institute and State University | Berry D.,Passive Sensors Unlimited LLC | Gao J.,Virginia Polytechnic Institute and State University | And 3 more authors.
Advanced Materials | Year: 2011

Extremely low equivalent magnetic noise in a Metglas/piezofiber magnetoelectric (ME) magetic-field sensor, realized through a combination of a giant ME effect and a reduction in constituent internal noise sources, is demonstrated. The ME coefficient is 52 V cm -1 Oe -1 at low frequency, the 1 Hz equivalent magnetic noise is 5.1 pT Hz -1/2, and the magnetic field sensitivity is 10 nT. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Wang Y.,Virginia Polytechnic Institute and State University | Gray D.,Virginia Polytechnic Institute and State University | Berry D.,Passive Sensors Unlimited LLC | Li M.,Virginia Polytechnic Institute and State University | And 3 more authors.
Journal of Alloys and Compounds | Year: 2012

The influence of the interfacial bonding condition between Pb(Zr,Ti)O 3 fibers and insulating Kapton films with interdigitated electrodes on the magnetoelectric (ME) response of Metglas/piezo-fiber heterostructures has been studied. An interfacial bonding method was developed, by which sensors exhibit a 1.3× enhancement in the ME coefficient (1 kHz), a 2× times reduction in the equivalent magnetic noise floor (1 Hz) and a 1.5× times increase in magnetic field sensitivity (1 Hz) relative to previous methods. © 2011 Elsevier B.V. All rights reserved.

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