DC and AC linear magnetic field sensor based on glass coated amor- phous microwires with Giant Magnetoimpedance
Giant Magnetoimpedance (GMI) effect has been studied in amorphous glass-coated microwires of composition (Fe6Co94)(72.5)Si12.5B15. The impedance of a 1.5 cm length sample has been characterized by using constant AC currents in the range of 400 mu A-4 mA at frequencies from 7 to 15 MHz and DC magneti...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universitat Politècnica de València (UPV) |
| Repositorio: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglés |
| OAI Identifier: | oai:riunet.upv.es:10251/65603 |
| Acceso en línea: | https://riunet.upv.es/handle/10251/65603 |
| Access Level: | acceso abierto |
| Palabra clave: | Giant Magnetoimpedance Amorphous microwire Magnetic field sensor TECNOLOGIA ELECTRONICA |
| Sumario: | Giant Magnetoimpedance (GMI) effect has been studied in amorphous glass-coated microwires of composition (Fe6Co94)(72.5)Si12.5B15. The impedance of a 1.5 cm length sample has been characterized by using constant AC currents in the range of 400 mu A-4 mA at frequencies from 7 to 15 MHz and DC magnetic fields from -900 to 900 A/m. Double peak responses have been obtained, showing GMI ratios up to 107%. A linear magnetic field sensor for DC and AC field has been designed, using two microwires connected in series with a magnetic bias of 400 A/m with opposite direction in each microwire in order to obtain a linear response from +/- 70 (A/m)(rms) for AC magnetic field, and +/- 100 A/m for DC magnetic field. A closed loop feedback circuit has been implemented to extend the linear range to +/- 1 kA/m for DC magnetic field. (C) 2014 Elsevier B.V. All rights reserved. |
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