Abstract
The crystal structure of ordered and disordered Fe–Pt Invar alloys has been investigated under high pressures up to 13GPa in the temperature range of 12–300K by in situ angle dispersive X-ray diffraction using synchrotron radiation. An FCC structure was confirmed to be stable in whole pressure range, and pressure-induced lattice softening was observed. The relationship between the pressure-induced magnetic phase transition and the lattice softening was discussed in connection with a recent band calculation.
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