Applications of amorphous microwires in sensing technologies

Issue title: Proceedings of the twelfth International Symposium on Interdisciplinary Electromagnetic, Mechanic and Biomedical Problems, ISEM Bad Gastein

Article type: Research Article

Authors: Vázquez, M.^{a; *} | Badini, G.^a | Pirota, K.^a | Torrejón, J.^a | Zhukov, A.^a | Torcunov, A.^a | Pfützner, H.^b | Rohn, M.^c | Merlo, A.^d | Marquardt, B.^e | Meydan, T.^f

Affiliations: [a] ICMM-CSIC, Madrid, 28049, Spain | [b] Bioelectricity and Magnetism Laboratory, TU Vienna, Austria | [c] Profactor, Steyr, Austria | [d] Centro Ricerche Fiat, Torino, Italy | [e] ELCAT, Wolfhausen, Austria | [f] Wolfson Centre for Magnetics Technology, University of Cardiff, Cardiff, UK

Correspondence: [*] Corresponding author. E-mail: [email protected]

Abstract: Amorphous glass-coated microwires exhibit excellent magnetic properties that make them very suitable to be employed as sensing elements in devices for technological applications. In the present work, we review a few examples. Some applications are based on the magnetostrictive character of Fe based wires that show also bistable magnetic behaviour. It includes magnetic labels or magnetoelastic pens for security applications. In the case of non-magnetostrictive wires, and based on the giant magnetoimpedance effect, they can be employed as tips in spin polarized magnetometry or as stress sensors. Most recently, a new family of microwires has been introduced, multilayered microwires, which offer quite interesting properties and can be employed as sensing elements in multifunctional sensor devices.

Keywords: Amorphous wires, magnetic sensors, magnetic bistability, giant magnetoimpedance

DOI: 10.3233/JAE-2007-744

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 25, no. 1-4, pp. 441-446, 2007