Sensor applications of soft magnetic materials based on magneto-impedance, magneto-elastic resonance and magneto-electricity

The outstanding properties of selected soft magnetic materials make them successful candidates for building high performance sensors. In this paper we present our recent work regarding different sensing technologies based on the coupling of the magnetic properties of soft magnetic materials with the...

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Bibliographic Details
Published in:	Sensors (Basel, Switzerland) Vol. 14; no. 5; pp. 7602 - 7624
Main Authors:	García-Arribas, Alfredo, Gutiérrez, Jon, Kurlyandskaya, Galina V, Barandiarán, José M, Svalov, Andrey, Fernández, Eduardo, Lasheras, Andoni, de Cos, David, Bravo-Imaz, Iñaki
Format:	Journal Article
Language:	English
Published:	Switzerland MDPI AG 25-04-2014 Molecular Diversity Preservation International (MDPI)
Subjects:	Construction materials Electricity Electrons Glass substrates Magnetic fields Magnetic materials Magnetic properties Magnetic resonance magnetic sensors magneto-elasticity magneto-electricity magneto-impedance Magnetoimpedance Ribbons Sensors Thin films Viscosity Spain
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Summary:	The outstanding properties of selected soft magnetic materials make them successful candidates for building high performance sensors. In this paper we present our recent work regarding different sensing technologies based on the coupling of the magnetic properties of soft magnetic materials with their electric or elastic properties. In first place we report the influence on the magneto-impedance response of the thickness of Permalloy films in multilayer-sandwiched structures. An impedance change of 270% was found in the best conditions upon the application of magnetic field, with a low field sensitivity of 140%/Oe. Second, the magneto-elastic resonance of amorphous ribbons is used to demonstrate the possibility of sensitively measuring the viscosity of fluids, aimed to develop an on-line and real-time sensor capable of assessing the state of degradation of lubricant oils in machinery. A novel analysis method is shown to sensitively reveal the changes of the damping parameter of the magnetoelastic oscillations at the resonance as a function of the oil viscosity. Finally, the properties and performance of magneto-electric laminated composites of amorphous magnetic ribbons and piezoelectric polymer films are investigated, demonstrating magnetic field detection capabilities below 2.7 nT.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Author Contributions Andrey Svalov fabricated the magneto-impedance nanostructures deposited and the magnetic characterization of the samples. David de Cos designed the GMI measurement setup, and Eduardo Fernández performed the measurements and interpreted the data of the magneto-impedance measurements. Galina V. Kurlyandskaya and Eduardo Fernández wrote the part of the manuscript related with the magneto-impedance Sensor. Iñaki Bravo-Imaz performed the measurements and interpreted the data of the Magnetoelastic Resonance Sensor measurements. Alfredo García-Arribas wrote the part of the manuscript related with the Magnetoelastic Resonance Sensor. Andoni Lasheras performed the measurements and interpreted the data of the Magnetoelectric Sensor measurements. Jon Gutiérrez wrote the part of the manuscript related with the Magnetoelectric Sensor. José M. Barandiarán wrote the introduction and conclusions of the manuscript. All authors discussed the results and implications, and commented on the manuscript at all stages. All authors read and approved the final manuscript.
ISSN:	1424-8220 1424-8220
DOI:	10.3390/s140507602