ISIS Neutron and Muon Source Data Journal

Structural and magnetic phase diagram of Pr2-xCaxNiO4+? (? >> 0 and ? ? 0) - a prototype system studying electronic orderings in the superconducting nickelates

Abstract: Certain Ruddlesden-Popper nickelates of the form Rn+1NinO3n+1 (n=2 where R is a rare-earth element, e.g. La3Ni2O7 [1]) have recently been discovered to host unconventional superconductivity (SC), giving a nearby chemical analogue to the famous cuprates which are well-known for their high critical temperatures and unsolved pairing mechanism. Surprisingly however, there has been little recent attention on the n = 1 family member, that is directly structurally analogous to the cuprate La2-xBaxCuO4. Here we propose a details neutron powder diffraction study of the phase diagram of Pr2-xCaxNiO4, that at x = 0.5 is isoelectronic with high pressure superconducting La3Ni2O7. We envisage that the phase diagrams detailing the magnetic and structural orderings at ambient pressure will be a vital point of reference for future studies of high-pressure SC in these and related materials.

Principal Investigator: Dr Mark Senn
Experimenter: Mr Jaskaran Singh Mangat
Experimenter: Dr Struan Simpson
Local Contact: Dr Gabriel Perez
Experimenter: Miss Elizabeth Arnold

DOI: 10.5286/ISIS.E.RB2520150

ISIS Experiment Number: RB2520150

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 Mark Senn et al; (2025): Structural and magnetic phase diagram of Pr2-xCaxNiO4+? (? >> 0 and ? ? 0) - a prototype system studying electronic orderings in the superconducting nickelates , STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520150

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