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Pure Iron Compressed and Heated to Extreme Conditions

A. S. Mikhaylushkin, S. I. Simak, L. Dubrovinsky, N. Dubrovinskaia, B. Johansson, and I. A. Abrikosov, Phys. Rev. Lett. 99, 165505 (2007).

Phase diagram of Fe. The conditions in the Earth's core are indicated with a vertical solid line marked as IOB (inner core - outer core boundary). The filled circles connected by a solid line represent the fcc-hcp phase boundary obtained theoretically in this work. In the low-pressure region the theoretical curve is shown as a long-dashed line with filled circles.  Note that in that region the neglect of the  magnetic contribution to the free  energy of Fe leads to an overestimation of the fcc-hcp  transition temperature;  the  opaque and filled squares correspond to  the present experimental points for  homogeneous hcp-Fe phase and the fcc/hcp phase mixture,  respectively.

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Last updated: 02/27/08