Authors
Citation
Hd. Williams et al., SUPERPARAMAGNETISM IN FINE PARTICLE DISPERSIONS, Journal of magnetism and magnetic materials, 122(1-3), 1993, pp. 129-133
Citations number
20
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
ISSN journal
03048853
Volume
122
Issue
1-3
Year of publication
1993
Pages
129 - 133
Database
ISI
SICI code
0304-8853(1993)122:1-3<129:SIFPD>2.0.ZU;2-A
Abstract
The magnetisation curves of two ferrofluids have been measured in the
temperature range 3.6-300 K. The measurements show superparamagnetic b
ehaviour above the freezing points of the fluids as demonstrated by th
e superposition of magnetization curves measured at different temperat
ures when plotted versus H/T. In the solid, however, superposition is
not observed since anisotropy barriers are presented. A theory describ
ing this behaviour is presented.