ISIS Neutron and Muon Source Data Journal

Revealing hidden atomic ordering in FeMn(P,Ge)

Abstract: In the magnetic refrigeration system FeMn(P,Si), there is a known ordering of the metals on two crystallographic sites. However, any ordering of the non-metals, on their two sites are currently unknown. P and Si have a very similar scattering power using both X-rays and neutron scattering methods, making them experimentally challenging to separate. By substitution Si with Ge, this challenge can be overcome making it possible to experimentally verify any preferred occupancy in the FeMn(P,Si/Ge)-system. This proposed experiment will study the nuclear structure for FeMnP0.67Ge0.33 at elevated temperature making the nuclear structure possible to analyse. These results will provide a deeper understanding of magnetic cooling materials based on Fe2P, and will also be essential to analyse the existing low temperature neutron diffraction data which also contains magnetic structure information.

Principal Investigator: Dr Johan Cedervall
Local Contact: Professor Paul Henry
Experimenter: Dr Sagar Ghorai

DOI: 10.5286/ISIS.E.RB2520102

ISIS Experiment Number: RB2520102

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr Johan Cedervall et al; (2025): Revealing hidden atomic ordering in FeMn(P,Ge), STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520102

Data is released under the CC-BY-4.0 license.