Other
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002geoji.149..805m&link_type=abstract
Geophysical Journal International, Volume 149, Issue 3, pp. 805-814.
Other
6
Magnetic Hysteresis, Magnetite, Multidomain Particles, Rock Magnetism, Rotational Hysteresis Losses
Scientific paper
A series of hysteresis and rotational hysteresis measurements have been made on a suite of sized hydrothermally grown multidomain magnetite samples. These measurements consisted of hysteresis measurements made between room temperature and the Curie temperature, remanent hysteresis measurements at room temperature and rotational hysteresis measurements also made at room temperature. It was found that several of the measured and calculated parameters, e.g. the coercive force and rotational hysteresis parameters, display slight grain-size dependences across the entire range of samples up to the largest sample, which has a mean grain size of 108 μm, whereas other results, e.g. Henkel plots, were grain-size independent. These results suggest that there is no clear pseudo-single domain to 'true' multidomain behaviour transition. On comparison of high-temperature hysteresis with micromagnetic calculations there appears to be a change in the dominant domain-wall pinning mechanism with temperature. It is suggested that this effect could provide a possible mechanism for domain wall reorganization models that have been developed to explain partial thermoremanence cooling behaviour. The room-temperature rotational hysteresis results indicate that in addition to anisotropy, which controls most of the magnetic behaviour, there is a much smaller very high intrinsic anisotropy. It is tentatively suggested that this very high intrinsic anisotropy could be related to metastable remanences in multidomain magnetite. On comparison with published 'crossover' template plots it is seen that the low dislocation density hydrothermally produced samples display behaviour that does not entirely correspond with the standard templates, implying that the template plots need to be reassessed.
No associations
LandOfFree
Magnetic hysteresis and rotational hysteresis properties of hydrothermally grown multidomain magnetite does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magnetic hysteresis and rotational hysteresis properties of hydrothermally grown multidomain magnetite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic hysteresis and rotational hysteresis properties of hydrothermally grown multidomain magnetite will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1212089