DocumentCode
1388130
Title
Pulse and low temperature magnetometry of γ-Fe2O 3 dispersions
Author
Greaves, S.J. ; Hancock, C.P. ; O´Grady, K. ; Lane, A.M.
Author_Institution
SEECS, Univ. Coll. of North Wales, Bangor, UK
Volume
32
Issue
5
fYear
1996
fDate
9/1/1996 12:00:00 AM
Firstpage
4040
Lastpage
4042
Abstract
Water and organic based dispersions of a γ-Fe2O 3 pigment have been prepared and measured using low temperature and pulsed field magnetometry. The objective of the study is to examine the role of dynamic effects in pulsed field measurements by comparison with low temperature studies where no such effects can occur. We find that fast pulsed fields t<100 μs effectively freeze the dispersion and enable studies of magnetic properties to be made without affecting the microstructure. Additionally, remanence curves and hysteresis loops have been measured at low temperatures to determine changes to the microstructure of the dispersion brought about by milling. δM plots showed an increase in negative interactions with milling time for the organic based dispersion but a decrease In these interactions for the water based dispersion
Keywords
disperse systems; iron compounds; magnetic hysteresis; magnetic particles; magnetic variables measurement; remanence; γ-Fe2O3 pigment; Fe2O3; dynamic effects; hysteresis; low temperature magnetometry; magnetic properties; microstructure; milling; organic based dispersion; pulsed field magnetometry; remanence; water based dispersion; Dispersion; Magnetic field measurement; Magnetic hysteresis; Magnetic properties; Microstructure; Milling; Pigmentation; Pulse measurements; Remanence; Temperature measurement;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/20.539256
Filename
539256
Link To Document