Improved Sensitivity and Noise in Magneto-Electric Magnetic Field Sensors by Use of Modulated AC Magnetostriction

被引：64

作者：

Gillette, S. M. ^{[1
]}

Geiler, A. L. ^{[1
]}

Gray, D. ^{[2
]}

Viehland, D. ^{[2
]}

Vittoria, C. ^{[1
]}

Harris, V. G. ^{[1
]}

机构：

[1] Northeastern Univ, Dept Elect & Comp Engn, Ctr Microwave Magnet Mat & Integrated Circuits, Boston, MA 02115 USA

[2] Virginia Tech, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

来源：

IEEE MAGNETICS LETTERS | 2011年 / 2卷

关键词：

Magneto-electronics; magneto-electric sensor; modulation technique; sensitivity enhancement;

D O I：

10.1109/LMAG.2011.2151178

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：

A magnetic field sensor based on the nonlinear nature of the magnetostrictive response of a magneto-electric (ME) heterostructure has two orders of magnitude improvement in sensitivity and signal-to-noise ratio compared with a conventional dc-biased configuration. The sensor consists of a longitudinally magnetized and transversely poled lamination of iron-cobalt-boron (Metglas) and lead zirconate titanate (PZT). The ac-modulated sensor has enhanced environmental noise immunity and does not require a dc magnetic bias field. Combined, these advantages hold promise for the development of miniature ME sensor elements for applications with size and weight limitations.

引用

页数：4

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