Other
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icar..139..367w&link_type=abstract
Icarus, Volume 139, Issue Icarus, pp. 367-373.
Other
7
Scientific paper
We report experimental evidence of the production of single-magnetic-domain iron grains via vapor-phase nucleation even in the absence of an ambient magnetic field. These single domain grains are thermodynamically stable as fully saturated magnetic dipoles. The spontaneous formation of fully magnetized single-domain iron grains, and by inference a variety of other single-domain particles such as taenite or magnetite, could greatly increase the coagulation efficiency of submicrometer-sized grains in the primitive solar nebula. An important test of this hypothesis is proposed: an examination of 20- to 50-nm diameter iron grains in the matrix of very primitive chondrites should reveal an interconnected, three-dimensional string or web-like structure within the matrix.
Nuth Joseph A.
Withey Paul A.
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