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A Practical and Automated Hall Magnetometer for Characterization of Magnetic Materials

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DOI: 10.4236/mi.2015.44005    4,255 Downloads   4,702 Views  

ABSTRACT

A versatile Hall magnetometer has been developed, manufactured, calibrated, and turned operational for measurements of the magnetic properties of bulk materials and magnetic micro- and nanoparticles. The magnetometer was constructed from the combination of various equipments, which was usually available in most laboratories, such as a Hall effect sensor, an electromagnet, a current source, and a linear actuator. The achieved sensitivity to the magnetic moment was approximately 10-8 Am2. The results were compared to measurements performed with commercial vibrating-sample magnetometers and superconductor quantum interference devices (SQUID) and showed errors of around 1.7% and a standard deviation of 1.2% in relation to measures themselves. The constructed Hall magnetometer records a magnetic hysteresis loop of up to 1.2 T at room temperature. This magnetometer is cost-effective, versatile, and suitable for research.

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Araujo, J. and Pereira, J. (2015) A Practical and Automated Hall Magnetometer for Characterization of Magnetic Materials. Modern Instrumentation, 4, 43-53. doi: 10.4236/mi.2015.44005.

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