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http://dx.doi.org/10.4283/JKMS.2012.22.2.045

Construction of Feed-back Type Flux-gate Magnetometer  

Son, De-Rac (Department of physics, Hannam University)
Abstract
Feed-back type 3-axis flux-gate magnetometer using Co-based amorphous ribbon (Metglass$^{(R)}$2714A) was constructed in this work. Measuring range of magnetic field and frequency were ${\pm}100\;{\mu}T$ and dc~10 Hz respectively. For the interface to computer, microcontroller and 24 bit ADC (Analog to Digital Converter) were employed and resolution of digital output was 0.1 nT. Magnetometer noise of analog output was 5 pT/$\sqrt{Hz}$ at 1 Hz. Digital output of the magnetometer showed linearity of $1{\times}10^{-4}$ and the offset drift was smaller than 0.2 nT during 1 h.
Keywords
magnetometer; low magnetic field; amorphous core; flux-gate magnetometer; magnetic sensor;
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