A magnetoelectric sensor of threshold DC magnetic fields
Abstract
A multiferroic magnetic field sensor capable of producing an output for threshold magnetic fields has been fabricated and characterized. The sensor consists of a trilayer composite of piezoelectric X-cut lanthanum gallium tantalate and magnetostrictive Metglas placed inside a solenoid and a wide-band amplifier. The composite plays two distinct roles in the device; it forms the feedback loop of an oscillator and sets the frequency of sustained oscillations. The sensor generated an output of 2.5 V at the longitudinal acoustic resonance frequency of 87.5 kHz for the trilayer for DC magnetic fields H = 0.3 to 50 Oe parallel to the composite plane. The device functions as a threshold magnetic field sensor for this H-interval, and the threshold ON and OFF H-values for an ac voltage output could be controlled electronically or with a proper choice of the ferromagnetic phase in the composite.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 19, 2017
- Source ID
- 10.1063/1.4981533
Entities
People
- D. Viehland
- Dmitri V. Chashin
- Gopalakrishnan Srinivasan
- Leonid Y. Fetisov
- Sergey A. Makovkin
- Vladimir. N. Serov
- Yuri K. Fetisov
Organizations
- Bauman Moscow State Technical University
- Defense Advanced Research Projects Agency
- National Science Foundation
- Oakland University
- Russian Center for Science Information
- Virginia Tech