Magnetoimpedance in amorphous wires and multifunctional applications: from sensors to tunable artificial microwave materials

This paper is aimed to give a generalized approach to magnetoimpedance (MI) in amorphous wires in relation to the applications in sensors and microwave materials, raising new ideas and concepts. The impedance change ratio per Oersted in Co–Fe wires runs into more than 100%/Oe at MHz frequencies. Thi...

Full description

Saved in:
Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2004-05, Vol.272-276, p.1452-1459
Main Authors: Panina, Larissa V., Makhnovskiy, Dmitriy P., Mohri, Kaneo
Format: Article
Language:English
Subjects:
Magnetic wires
Magneto-impedance
Microwave activity
Microwave materials
Surface impedance
Tunability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper is aimed to give a generalized approach to magnetoimpedance (MI) in amorphous wires in relation to the applications in sensors and microwave materials, raising new ideas and concepts. The impedance change ratio per Oersted in Co–Fe wires runs into more than 100%/Oe at MHz frequencies. This makes wire elements unique for various sensing applications. The emphasis required here is on induced asymmetric and off-diagonal effects to produce highly sensitive and linear responses with respect to the sensed external forces (magnetic field, stress). The field sensitivity of the impedance in wires with a circumferential anisotropy remains very high even at the GHz range. The combination of microwave properties of wires with electrodynamic behavior of wire-composite materials is foreseen as resulting in completely new effects such as magnetic field-dependent dielectric response and microwave activity. Thus, the MI effect can be useful to design microwave composites with tunable properties including negative permittivity, band-gap structures and waveguides.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2003.12.1285