Computer-aided inspection center for magnetoimpedance spectroscopy

Abstract

Principles of measuring magnetoimpedance effect in samples that are intended for constructing electronic circuits that contain sensing elements for detecting weak magnetic fields, including stray fields, are described. Special attention is paid to those existent techniques of measuring magnetoimpedance effect in magnetic structures with distinctly manifested magnetic anisotropy that have already been used in or look promising for systems of magnetic nondestructive testing. The merits and drawbacks of a computer-aided magnetoimpedance-spectroscopy facility that has been designed at Ural Federal University are discussed in detail. The facility is based on an Agilent E4991a impedance analyzer that has been adapted for studying a wide class of magnetic structures.