Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 331, Issue -, Pages 264-268Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2012.11.034
Keywords
Magnetic fluid; Magnetic measurement; Heating power; Hysteresis loop; Complex susceptibility
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This paper firstly presents a measurement system for determining the magnetic properties of magnetic fluids, based on three pickup coils. The accuracy of the system was tested on known samples and then used for the characterization of magnetic losses (heating power P) on the magnetic fluid sample using two different methods. The first method is based on determining the hysteresis loop area and the second on determining the complex susceptibility; and showed that both methods are equivalent. The aim of this paper was to identify the heating power of the liquid at a known value for the magnetic field, and the arbitrary temperature. Thus, we explored the actual reduction in the heating power due to the heating of the sample, which cannot be achieved without the temperature regulated heat bath using established calorimetric methods. (C) 2012 Elsevier B.V. rights reserved.
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