Abstract
High-pressure neutron diffraction data from powder and single-crystal samples of atomically disordered (F m 3 m) and ordered (P m 3 m) Pd 3 Fe were collected up to pressures of 15 GPa, and high-pressure SQUID magnetometry data were collected up to 6 GPa. The data show a subtle decrease in the magnetic moment with applied pressure, resulting in a transition to a paramagnetic state by approximately 8 GPa at 300 K. Diffraction results have been used to determine the equation of state, resulting in a bulk modulus of 176.78(9) GPa for the disordered powder and 187.96(7) GPa for the ordered single-crystal samples, approximately 20% more compressible than previously reported from X-ray measurements. High-Temperature superconducting quantum interference device magnetometry was used to confirm the ambient pressure Curie temperature of the sample (545 K), which was further investigated using high-Temperature single-crystal neutron diffraction at ambient pressure.
| Original language | English |
|---|---|
| Article number | 015901 |
| Journal | Journal of Applied Physics |
| Volume | 125 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 7 2019 |
| Externally published | Yes |
Funding
The authors acknowledge the Science and Technology Facilities Council for providing access to the WISH, PEARL, and SXD instruments at the ISIS Neutron and Muon Source. This work was funded and supported through the STFC studentship and the EPSRC (Grant No. EP/J00099X). The authors wish to thank Dmitry Sokolov for his assistance with preparing the single crystal samples and Paul Steadman for his assistance with the high temperature SQUID measurements. The authors would also like to thank James Taylor for assisting with high temperature treatment of the precursor materials and Daniel Nye and Gavin Stenning for their assistance with the SQUID in the Materials Characterisation Laboratory at the ISIS Neutron and Muon Source.