Magnetic and structural transition in Fe3S at high pressures

Details Magnetic and structural transition in Fe3S at high pressures Magnetic and structural transition in Fe3S at high pressures

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufm.v31d0961s&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #V31D-0961

Physics

3924 High-Pressure Behavior, 3954 X Ray, Neutron, And Electron Spectroscopy And Diffraction, 8124 Earth'S Interior: Composition And State (Old 8105), 8147 Planetary Interiors (5430, 5724)

Scientific paper

Fe3S, containing 16.1 wt% sulfur, is the most iron rich compound in the Fe-FeS system. If sulfur is a dominant light element in an iron bearing planetary core, Fe3S could be a major stable phase together with iron in a solid core. We have studied magnetic properties of Fe3S at high pressures to 31 GPa in a diamond anvil cell. The Fe3S sample was synthesized in a large volume press. By measuring the pressure dependence of Fe Kβ fluorescence line using x-ray emission spectroscopy, we have observed a magnetic transition in Fe3S at pressures around 20-25 GPa and at room temperature. The relative intensities of spectral features indicate the collapse of the 3d electron magnetic moment at the transition. This magnetic transition is found to be reversible with pressure, and associated with a structural transition as evidenced from x-ray diffraction measurements.

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