Physics
Scientific paper
Mar 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984georl..11..197l&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 11, March 1984, p. 197-200. Research supported by the U.S. National Research
Physics
10
Hematite, Ilmenite, Magnetization, Remanence, Solid Solutions, Magnetic Measurement, Microstructure
Scientific paper
In the ilmenite-hematite solid solution series, compositions more ilmenite-rich than Ilm(73)Hem(27) are classically thought to be paramagnetic at room temperature. Ilm(80)Hem(20) samples have nevertheless been synthesized that acquire hard saturation remanent and thermoremanent moments. From analysis of AC demagnetization data, the source of the measured remanence is believed to be a single-domain (SD) like material within the IlM(80)Hem(20) grains themselves. On the basis of transmission electron microscope observations, it is suggested that transformation-induced domain boundaries, which in part are enriched in hematite component relative to the bulk composition of the grains, could act as the magnetic carrier of the SD-like remanence.
Lawson Andrew C.
Nord Gordon L. Jr.
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