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Physical Properties of Magnetic Fluids and Nanoparticles from Magnetic and Magneto-rheological Measurements

✍ Scribed by Ladislau Vékás; Mircea Raşa; Doina Bica

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
90 KB
Volume
231
Category
Article
ISSN
0021-9797

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✦ Synopsis

Static magnetization curves and the magnetorheological effect were used to study the microstructural properties (agglomerate formation) of magnetic fluids and the properties of dispersed nanoparticles. Improved techniques for magnetogranulometry analysis and a formula for the magnetoviscous effect were proposed. The area of applicability of some existing models was studied. The density, distribution, and dimension of particles, as well as the thickness of the nonmagnetic layer were accurately determined from magnetic measurements. The Shliomis diameter and the effective anisotropy constant were determined from rheological and magnetorheological measurements using information obtained from magnetization curves.

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