Details

Autor(en) / Beteiligte

• Winterrose, M L
• Lucas, M S
• Yue, A F
• Halevy, I
• Mauger, L
• Muñoz, J A
• Hu, Jingzhu
• Lerche, M
• Fultz, B

Titel

Pressure-Induced Invar Behavior in Pd3Fe

Ist Teil von

• Physical review letters, 2009-06, Vol.102 (23), p.237202-237202

Ort / Verlag

United States

Erscheinungsjahr

2009

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• Synchrotron x-ray diffraction (XRD) measurements, nuclear forward scattering (NFS) measurements, and density functional theory (DFT) calculations were performed on L1_{2}-ordered Pd3Fe. Measurements were performed at 300 K at pressures up to 33 GPa, and at 7 GPa at temperatures up to 650 K. The NFS revealed a collapse of the 57Fe magnetic moment between 8.9 and 12.3 GPa at 300 K, coinciding with a transition in bulk modulus found by XRD. Heating the sample under a pressure of 7 GPa showed negligible thermal expansion from 300 to 523 K, demonstrating Invar behavior. Zero-temperature DFT calculations identified a ferromagnetic ground state and showed several antiferromagnetic states had comparable energies at pressures above 20 GPa.