MAGNETOELECTRIC SUSCEPTIBILITY MEASUREMENT SYSTEM

摘要

A magnetoelectric susceptibility measurement system is provided to widen an application range by measuring a magnetoelectric effect of magnetoelectric materials in low and high frequency bands. A magnetoelectric susceptibility measurement system is composed of a magnet(120) for applying a DC(Direct Current) magnetic field(Hbias) to a magnetoelectric sample(110), an AC(Alternating Current) induction coil for applying an AC magnetic field(deltaH) to the magnetoelectric sample, a charge amplifier for applying a charge signal of the magnetoelectric sample vibrated by the AC magnetic field, and a phase sensitive detector for detecting a charge signal amplified in the charge amplifier while supplying induction current to the AC induction coil. The electromagnet or superconductive magnet is used. The charge amplifier has a resistor, a condenser, and an operational amplifier connected in parallel.