Tailoring magnetic properties and magnetoimpedance response in nanocrystalline (Fe3Ni)81Nb7B12 ribbons for sensor applications
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González Alonso, David; González Legarreta, Lorena; Marcin, Jozef; Švec, Peter; Škorvánek, IvanFecha
2023-02-17Derechos
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.
Publicado en
Chemosensors, 2023, 11(2), 148
Editorial
MPDI
Palabras clave
Magnetoimpedance effect
Field sensitivity
Domain structure
Skin effect
FeNi-nanocrystalline
Ribbons
Resumen/Abstract
Today, there is an increasing demand for progress in the magnetoimpedance (MI) response of cost-effective soft-magnetic materials for use in high-performance sensing devices. In view of this, we investigate here the field-annealing effects on soft-magnetic properties, magnetoimpedance response, and field sensitivity in the nanocrystalline (Fe3Ni)81Nb7B12 alloy ribbons. We observe that within the low-frequency regime, between 2 and 5 MHz, the zero-field-annealed (ZFA) ribbons exhibit the highest magnetoimpedance values. By magneto-optical Kerr effect measurements, we show that this result stems from the formation of irregular transversally patched magnetic domains after annealing, which in turn explains the induced transverse anisotropy necessary to increase the GMI response. In addition, we discuss this increment in terms of skin effect. Moreover, we report that the highest sensitivity of ca. 189%/(kA/m)—15%/Oe—is achieved for the field-annealed samples whose magnetic field was applied transverse to the ribbon axis. These findings are of practical importance to develop and refine highly sensitive magnetic sensors.
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