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Home > Issues > Volume 1 (1996) > No.2(pp.55-100)

A Magnetic Hysteresis Curve Tracer for Rare Earth

Journal of Magnetics, Volume 1, Number 2, 31 Dec 1996, Pages 94-100
J.R. Rhee(Physics Department, Sookmyung Women's University)
Abstract
A hysteresis loop tracer using a pulsed high magnetic field of 113.4 kOe, which is suitable for rare earth based permanent magnets, is constructed. The high pulsed magnetic field is generated by discharging a large capacitance charge (5 mF) with a voltage of 600 V into an air solenoid with the inner diameter of 14 mm, outer diameter of 36 mm and the lingth of 34 mm. A computer simulation method is used for the construction of an electromagnet to optimize the many parameters such as the discharge current, generated pulsed magnetic field intensity, thermal dissipation, capacitance, charged voltage, period of damping oscillation and solenoid geometry. By using the hysteresis loop tracer constructed in this work, we are able to measure hystersis loops of several rare earth based permanent magnets with large values of the remanent magnetization, coercvity and energy product.
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