Self-reversal of isothermal remanent magnetization in a pyrrhotite (Fe7S8) crystal

Details Self-reversal of isothermal remanent magnetization in a pyrrhotite (Fe7S8) crystal Self-reversal of isothermal remanent magnetization in a pyrrhotite (Fe7S8) crystal

Mar 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992pepi...70..302z&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 70, Issue 3-4, p. 302-311.

Physics

7

Scientific paper

The remanent magnetization induced at room temperature (IRM) was measured for powder and massive specimens separated from a Fe7S8 crystal. To characterize the crystal, several methods were used including Mössbauer spectroscopy, thermomagnetic analysis, low-field susceptibility anisotropy and magnetic colloid method. Self-reversals of IRM were revealed in the massive crystal fragment after its magnetization in magnetic fields of the order of 10-102 mT. Both normal and reverse IRM vectors lay in the maximum susceptibility plane perpendicular to the crystallographic c'-axis of the crystal. A twinning also perpendicular to the crystal's c'-axis and a very low coercivity in each twin (monocrystallic layer) probably support the origin of the reverse IRM in the crystal.

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