Development of Ultra-Thin Glass-Coated Amorphous Microwires for High Frequency Magnetic Sensors Applications

V. Zhukova*, 1, M. Ipatov2, C. García2, J. Gonzalez2, J.M. Blanco1, A. Zhukov2, 3
1 Dpto. de Física Aplicada, EUPDS, Universidad del País Vasco, 20009 San Sebastián, Spain
2 Dpto. de Física de Materiales, Fac. Químicas, Universidad del País Vasco, 20009 San Sebastián, Spain
3 TAMAG Ibèrica S.L., Parque Tecnológico de Miramón, Paseo Mikeletegi 56, 1ª Planta, 20009 San Sebastián, Spain

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© 2007 Zhukova et al.;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Dpto. de Física Aplicada, EUPDS, Universidad del País Vasco, 20009 San Sebastián, Spain; E-mail:


The giant magneto-impedance (GMI) effect has been studied in 3 different families of amorphous wires: conventional amorphous wires (125 μm in diameter), cold drawn wires (50 and 20 μm in diameter) and thin glass coated amorphous microwires (with metallic nucleus diameter of about 15 μm). These wires have been investigated in the frequency range 1 – 500 MHz. A remarkable difference in the magnetic field dependence of the GMI effect can be attributed to the different magnetoelastic anisotropy of these three families of the wires.

Keywords: Amorphous wires and microwires, giant magneto-impedance, skin effect.