Enhanced sensitivity of magnetoelectric sensors by tuning the resonant frequency | Zendy

Jonathan R. Petrie | Zendy; Jonathan E. Fine | Zendy; S. K. Mandal | Zendy; G. Sreenivasulu | Zendy; G. Srinivasan | Zendy; A. S. Edelstein | Zendy

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Enhanced sensitivity of magnetoelectric sensors by tuning the resonant frequency

Author(s) -

Jonathan R. Petrie,

Jonathan E. Fine,

S. K. Mandal,

G. Sreenivasulu,

G. Srinivasan,

A. S. Edelstein

Publication year - 2011

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.3617428

Subject(s) - sensitivity (control systems) , torque , stiffness , materials science , resonance (particle physics) , low frequency , nuclear magnetic resonance , optoelectronics , acoustics , physics , composite material , atomic physics , electronic engineering , engineering , astronomy , thermodynamics

The sensitivity of magnetoelectric (ME) sensors is more than an order of magnitude higher at their mechanical resonant frequency fr. By applying a restoring torque to an asymmetric ME sensor, we have increased its effective stiffness and, thus, fr by 20% while maintaining the enhanced sensitivity at resonance. The torque was dependent on both the tensile force from a suspended weight and the length of the wire attaching it. This provides two alternative routes for tuning fr to optimize performance. We have detected fields below 10 pT at both the shifted and unshifted fr of 132.2 Hz.

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