ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Magnetic structure determination of the first high pressure, high entropy oxide
Abstract: High entropy oxides (HEOs) are a family of materials with extreme configurational disorder ? but how their entropic forces interact with external conditions such as high pressure remains an unexplored arena. We have succeeded in synthesising the first high pressure, high entropy oxide. The material, which forms at 15 GPa, has the nominal composition (Cr,Mn,Fe,Co,Ni)4O5, and crystallises in the orthorhombic Cmcm space group, making it one of the first non-cubic HEOs. Early characterisation shows remarkably complex magnetic order, with enigmatic features that cannot be disentangled without more advanced techniques. X-ray absorption spectroscopy shows mixed site occupancies, while confirming a trend of suppressed configurational entropy in HEOs composed of 3d transition metals. Our proposed experiment will utilise neutron powder diffraction to solve the material?s magnetic structure, and explore its evolution as a function of temperature. The chemical complexity and magnetic nature of our system makes neutron diffraction an invaluable tool to answer these pressing questions. Our results will represent a significant contribution to our understanding of the evolution of properties in HEOs, and the interactions between magnetism and disorder in complex materials.
Public release date: 16 May 2027
Principal Investigator: Professor Alannah Hallas
Experimenter: Ms Megan Rutherford
Experimenter: Mr Mario Ulises Gonzalez Rivas
Experimenter: Dr Minu Kim
Local Contact: Dr Pascal Manuel
DOI: 10.5286/ISIS.E.RB2467011-1
Parent DOI: 10.5286/ISIS.E.RB2467011
ISIS Experiment Number: RB2467011
Part Number: 1
This dataset is NOT yet publicly available.
The release date is: 16 May 2027
download
the dataset
Date of Experiment: 14 December 2024
Publisher: STFC ISIS Neutron and Muon Source
Data format: RAW/Nexus
Select the data format above to find
out more about it.
Data Citation
The recommended format for citing this dataset in a research
publication is as:
[author], [date], [title], [publisher],
[doi]
For Example:
Professor Alannah Hallas et al; (2024): Magnetic structure determination of the first high pressure, high entropy oxide, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2467011-1
Data is released under the CC-BY-4.0 license.
