Journal
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Volume 211, Issue 5, Pages 980-985Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201300717
Keywords
Co-rich glass-coated microwires; giant magnetic impedance (GMI) effect; magnetometer
Funding
- EU under FP7 EM-safety project
- Spanish Ministry of Science and Innovation
- MICINN [MAT2010-18914]
- Basque Government [S-PE12UN139, SA-2013/00035, SA-2013/00018]
- Basque Government under Program of Mobility of the Investigating Personnel of the Department of Education, Universities and Investigation [MV-2013-2-22, MV-2013-2-23]
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The design and performance of a magnetometer based on the off-diagonal GMI effect in Co-rich glass-coated microwire are presented. The sensing element of the magnetometer is a 10-mm long piece of Co-Fe-Ni-B-Si-Mo microwire with a small pick-up coil of 85 turns wounded around the microwire. The electronics with a feedback circuit is used to register an electromotive force proportional to the external magnetic field applied along the wire axis. In the absence of the feedback current the magnetometer is capable of measuring a narrow range of magnetic fields, 3.5T, in the frequency range of 0-1kHz, the level of the equivalent magnetic noise being about 10pTHz(-1/2) at a frequency of 300Hz. The use of the feedback circuit increases the range of the measured magnetic fields up to +/- 250T. [GRAPHICS] Photo of the giant magnetoimpedance magnetometer based on the off-diagonal GMI effect in Co-rich glass-coated microwire. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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