METHOD AND DEVICE FOR MEASURING MAGNETIC GRADIENT AND MAGNETIC SUSCEPTIBILITY OF A MATERIAL

摘要

The invention concerns a method and a device for measuring the magnetic gradient and/or the magnetic susceptibility of a material. A magnetically hard material is securely fastened to a vibrating element, and by means of any known technique the assembly is vibrated at the resonance frequency or the harmonics thereof and the frequency, phase or amplitude variations which occur when an external gradient acts on the magnetically hard material are measured.