A simple and novel SAW magnetic sensor with PVA bound magnetostrictive nanopowder film

被引：4

作者：

Fahim ^{[1
]}

Mainuddin ^{[2
]}

Rajput, Pooja ^{[1
]}

Kumar, Jitender ^{[1
]}

Nimal, A. T. ^{[1
]}

机构：

[1] Solid State Phys Lab, Delhi 54, India

[2] Jamia Millia Islamia, Dept Elect & Commun Engn, Delhi 25, India

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2021年 / 331卷

关键词：

Magnetic field sensor; Surface Acoustic Wave; Magnetostriction; Polyvinyl Alcohol; FIELD;

D O I：

10.1016/j.sna.2021.112926

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper a Surface Acoustic Wave (SAW) magnetic field sensor based on magnetostriction effect was realized using a simple, inexpensive and novel approach. A single port SAW resonator on ST-Quartz substrate was used and configured as a Colpitt Oscillator. A novel coating approach was adopted whereby a thin layer of Polyvinyl Alcohol (PVA) was coated on bare SAW device to passivate and electrically isolate the Inter Digital Transducers (IDTs) followed by thin layer of PVA nanocomposite magnetostrictive coating applied using drop dry method. Separate sensors were realized using Nickel (Ni) and Iron (Fe) materials and their performances were evaluated using a Helmholtz coil. Good magnetic sensitivity and repeatability was observed in developed sensors. Excellent long term stability was achieved and no fatigue was observed. (C) 2021 Elsevier B.V. All rights reserved.

引用

页数：8

共 39 条

[1] Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites [J].