Dilution series approach for investigation of microstructural properties and particle interactions in high-quality magnetic fluids |
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| Authors: | M. Raşa D. Bica A. Philipse L. Vékás |
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| Affiliation: | (1) Van 't Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute, Utrecht University, Padualaan 8 3584 CH Utrecht, The Netherlands, NL;(2) Institute for Complex Fluids, “Politehnica” University of Timişoara, Bd. Mihai Viteazul 1, Timişoara-1900, Romania, RO;(3) Center for Fundamental and Advanced Technical Research, Romanian Academy of Science, Timişoara Branch Bd. Mihai Viteazul 24, Timişoara-1900, Romania, RO |
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| Abstract: | ![]()
The aim of the paper is to study the deviation of magnetic properties of the magnetic fluids prepared for this study, from ideal (Langevin) behaviour, i.e. to estimate particle interaction influence and dimensions and influence of particle aggregates, as well as to explain the related effects observed. We also determine the particle coupling parameter, the particle nonmagnetic layer thickness, and the particle distribution, which are fundamental for sample characterization. A comparison of the studied magnetic fluids with each other, with respect to microstructure formation and particle interaction strength is finally done. For these purposes, a concentration dependence study, following the proposed “dilution series approach”, is performed. Three series of dilutions of three types of magnetic fluids were prepared and analyzed. Received 27 August 2001 |
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| Keywords: | PACS. 75.50.Mm Magnetic liquids – 75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects – 82.70.Dd Colloids |
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