GMI Output Stability of Glass-coated Co-based Microwires for Sensor Application

摘要

We report a study here on the technique of Cu electro-plated wire-connecting for stabilizing the GMI output of Co_(68.15)Fe_(4.35)B_(15)Si_(12.5) glass-coated amorphous microwires at the magnetic field ranging from 0 Oe to 4.2 Oe. The GMI output stability was characterized by a precision impedance analyzer and in a magnetically shielded space (MSS). The results show that this method could reduce the emission of RF electro-magnetic wave and driving signal attenuation, minimize the disturbance of stray capacity and parasitic capacity, and suppress high frequency destabilization and concussion at the relatively high frequency (≥ MHz), hence effectively improve the GMI output stability for high-resolution magnetic sensor application.