A magnetoelectric sensor of threshold DC magnetic fields

被引：17
作者：
Fetisov, Leonid Y. [1 ]
Serov, Vladimir. N. [1 ]
Chashin, Dmitri V. [1 ]
Makovkin, Sergey A. [1 ]
Srinivasan, G. [2 ]
Viehland, D. [3 ]
Fetisov, Yuri K. [1 ]
机构：
[1] Moscow Tech Univ MIREA, Moscow 119454, Russia
[2] Oakland Univ, Phys Dept, Rochester, MI 48309 USA
[3] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA
来源：
JOURNAL OF APPLIED PHYSICS | 2017年 / 121卷 / 15期
基金：
美国国家科学基金会; 俄罗斯基础研究基金会;
关键词：
Acoustic fields - Magnetometers;
D O I：
10.1063/1.4981533
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. Published by AIP Publishing.
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页数：4
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