A Practical and Automated Hall Magnetometer for Characterization of Magnetic Materials

• 作者: Jefferson F. D. F. Araujo Joao M. B. Pereira
• 来源期刊: 现代仪器(英文)
• 学科: 医学
• 关键词: PRACTICAL MAGNETOMETER HALL SENSOR CHARACTERIZATION of Magnetic Materials
• 年，卷（期）: 2015,（4）
• 页码范围: 43-53
• 页数: 11页
• 分类号: R73

摘要

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.