The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments

Details The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments

Feb 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974e%26psl..21..288d&link_type=abstract

Earth and Planetary Science Letters, Volume 21, Issue 3, p. 288-294.

Physics

7

Scientific paper

The pseudo-single-domain (PSD) intensity and stability of thermoremanent magnetization (TRM) in multidomain magnetite grains 0.05-15 μm in size are attributed to residual magnetic moments not removed by demagnetization. Barkhausen discreteness in domain wall positions is a possible source of such moments, but the observed grain size and applied field dependences of TRM in the lower PSD range are more convincingly explained by a new theory (F.D. Stacey and S.K. Banerjee, 1974) in which the moments of domain walls and the surface terminations of domain walls play a central role. The magnitudes of PSD moments and the average number of moments per grain required by this theory are deduced from low-field (0-25 Oe) TRM measurements on magnetite grains of controlled sizes between 0.04 and 0.22 μm. The predicted maximum PSD moment is about equal to the saturation moment in grains <= 0.1 μm in size but is only 10% of the saturation moment in 0.22-μm grains. Since blocking temperature and hysteresis data independently suggest two-domain structure in 0.22-μm grains and wall-like domain structure in smaller grains, the predicted PSD moments are quantitatively reasonable. Now at South Brisbane Technical College, Brisbane, Australia.

Affiliated with

Also associated with

No associations

Rating

The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments 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 The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The origin of thermoremanent magnetization: Contribution of pseudo-single-domain magnetic moments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1371093