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Magnetic Properties of Hexagonal Closed-Packed Iron Deduced from Direct Observations in a Diamond Anvil Cell

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Science  02 Jan 1998:
Vol. 279, Issue 5347, pp. 72-74
DOI: 10.1126/science.279.5347.72

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Abstract

The attraction of hexagonal closed packed (hcp) iron to a magnet at 16.9 gigapascals and 261 degrees centigrade suggests that hcp iron is either paramagnetic or ferromagnetic with susceptibilities from 0.15 to 0.001 and magnetizations from 1800 to 15 amperes per meter. If dominant in Earth's inner core, paramagnetic hcp iron could stabilize the geodynamo.

  • * Also at Institute of Tectonics, University of California, Santa Cruz, CA 95064, USA.

  • Also at Earth Sciences Department, University of California, Santa Cruz, CA 95064, USA.

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