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Title: Giant magnetoimpedance sensor integrated in an oscillator system

Abstract

This article presents a magnetic field measurement system using giant magnetoimpedance (GMI) sensor as a phase shift element. Investigations were carried out using CoFeB trilayer thin films with 2 kA/m anisotropy field structured as strips and meanders of 300 {mu}m length presented in previous studies. The GMI sensor is integrated into an oscillator circuit. The measurement system detects the phase change caused by the magnetic field to be measured. A 6.85% impedance decrease at an applied field of 1.4 mT was observed. The phase difference in such cases was {delta}{phi}=1.12 deg. . The transmission constant was {mu}{sub a}/{delta}{phi}=1 mV/deg.

Authors:
; ; ;  [1]
  1. Institute of Sensor and Actuator Systems, Vienna University of Technology, Gusshausstrasse 25-29/366, Vienna, A-1040 (Austria)
Publication Date:
OSTI Identifier:
20788118
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 99; Journal Issue: 8; Other Information: DOI: 10.1063/1.2170051; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANISOTROPY; BORON ALLOYS; COBALT ALLOYS; IMPEDANCE; IRON ALLOYS; MAGNETIC FIELDS; MAGNETORESISTANCE; OSCILLATORS; PHASE SHIFT; THIN FILMS

Citation Formats

Giouroudi, I., Hauser, H., Musiejovsky, L., and Steurer, J. Giant magnetoimpedance sensor integrated in an oscillator system. United States: N. p., 2006. Web. doi:10.1063/1.2170051.
Giouroudi, I., Hauser, H., Musiejovsky, L., & Steurer, J. Giant magnetoimpedance sensor integrated in an oscillator system. United States. doi:10.1063/1.2170051.
Giouroudi, I., Hauser, H., Musiejovsky, L., and Steurer, J. Sat . "Giant magnetoimpedance sensor integrated in an oscillator system". United States. doi:10.1063/1.2170051.
@article{osti_20788118,
title = {Giant magnetoimpedance sensor integrated in an oscillator system},
author = {Giouroudi, I. and Hauser, H. and Musiejovsky, L. and Steurer, J.},
abstractNote = {This article presents a magnetic field measurement system using giant magnetoimpedance (GMI) sensor as a phase shift element. Investigations were carried out using CoFeB trilayer thin films with 2 kA/m anisotropy field structured as strips and meanders of 300 {mu}m length presented in previous studies. The GMI sensor is integrated into an oscillator circuit. The measurement system detects the phase change caused by the magnetic field to be measured. A 6.85% impedance decrease at an applied field of 1.4 mT was observed. The phase difference in such cases was {delta}{phi}=1.12 deg. . The transmission constant was {mu}{sub a}/{delta}{phi}=1 mV/deg.},
doi = {10.1063/1.2170051},
journal = {Journal of Applied Physics},
number = 8,
volume = 99,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}