Fifty years of ferromagnetic single-domain theory

Details Fifty years of ferromagnetic single-domain theory Fifty years of ferromagnetic single-domain theory

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jgr...10330533k&link_type=abstract

Journal of Geophysical Research, Volume 103, Issue B12, p. 30533-30536

Physics

Geophysics

Geomagnetism And Paleomagnetism: Rock And Mineral Magnetism

Scientific paper

Kittel [1946] gave the original presentation of the theory of the single-domain (SD) structure of fine ferromagnetic particles and their response to an applied magnetic field. The theory predicted that the SD coercive fields would be determined by the crystalline and shape anisotropies of the particle and could be much higher than those for the multidomain specimens used in magnetic recording at that time. The current magnetic recording industry has developed the use of magnetic fine particles. In geophysics, the observational evidence for plate tectonics, continental drift, and reversals rely, in lava flows, on the thermoremanent magnetization acquired on cooling through the Curie temperature. In sediments where physical deposition of magnetic particles occur, the measurements are of the magnetic orientations at times of deposition or soon thereafter of single-domain grains of inorganic or biogenic origin. To obtain the maximum total magnetic moment in a magnetobacterium, it is counterproductive for magnetosome growth to exceed the single-domain size limit. If in future extraterrestrial single-domain magnetic particles are found that are characteristic of magnetotactic bacteria, as in meteorite arrivals from Mars or other planets, they could be cited as evidence for extraterrestrial life.

Affiliated with

Also associated with

No associations

Rating

Fifty years of ferromagnetic single-domain theory 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 Fifty years of ferromagnetic single-domain theory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fifty years of ferromagnetic single-domain theory will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1294312