Face-centered-cubic iron (γ-Fe) coherently precipitated in a single crystal of Cu has been studied by neutron diffraction at high pressures up to 0.9 GPa and in the temperature range from about 5 to 110 K. It undergoes antiferromagnetic ordering at 67±2 K at ambient pressure. The ordering temperature TN monotonically decreases with increasing pressure following a relation TN(K)=67-12.8p - 11.1p2 - 6.17p3, where p is in units of GPa. The change of TN in γ-Fe is discussed in terms of the volume change caused by pressurization or by alloying.
O. A. Pringle et al., "Neutron-Diffraction Study of γ-Fe at High Pressure," Physical Review B, vol. 50, no. 6, pp. 3532-3535, American Physical Society, Aug 1994.
The definitive version is available at http://dx.doi.org/10.1103/PhysRevB.50.3532
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