AN EXPERIMENTAL-STUDY OF THE STEP-RESPONSE FUNCTION OF FERROFLUIDS ASA FUNCTION OF PARTICLE-VOLUME FRACTION

Authors
FANNIN PC CHARLES SW
Citation
Pc. Fannin et Sw. Charles, AN EXPERIMENTAL-STUDY OF THE STEP-RESPONSE FUNCTION OF FERROFLUIDS ASA FUNCTION OF PARTICLE-VOLUME FRACTION, Journal of magnetism and magnetic materials, 136(3), 1994, pp. 287-293
Citations number
18
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
136
Issue
3
Year of publication
1994
Pages
287 - 293
Database
ISI
SICI code
0304-8853(1994)136:3<287:AEOTSF>2.0.ZU;2-G
Abstract
Measurements are reported on the step-response function, F(t), or magn etisation decay of five ferrofluid samples of magnetite in Isopar M wi th packing fractions ranging from 0.019 to 0.115. An alternative to th e conventional method of measuring magnetisation decay involving the u se of dc fields is used, with F(t) being obtained by means of a techni que which utilises complex susceptibility data. The presence of a part icle size distribution is accounted for with a measure of the particle distribution in each sample being determined by means of the 'approxi mate ellipse' technique.