ISIS Neutron and Muon Source Data Journal

Magnetic excitations in La1.2Sr0.8NiO4 and LaSrNiO4

Abstract: The recent exciting observations in the magnetic excitation spectra of cobalt oxides that are isostructural to the prototypical high-temperature superconducting cuprates have shown the importance to study also copper-free reference systems. Here, we would like to study the spin excitations of another copper-free reference system - highly oxidized nickelates La(2-x)Sr(x)NiO4. Although the low-doped nickelates (x <= 1/2) have been very intensely studied in the past nothing is reported about the excitation spectra on the highly hole doped side of the phase diagram (x >> 1/2). Whereas a robust charge stripe phase occurs at lower hole-doping the role of holes and Ni2+ ions is reversed at high hole-doping. Indeed, we observe unexpected magnetic correlations at high hole-doping and need to extend our studies to a higher energy range now in order to understand these surprising findings.

Principal Investigator: Dr Alexander Christoph Komarek
Local Contact: Dr Helen Walker
Experimenter: Dr Zhiwei Li
Experimenter: Dr Toby Perring
Experimenter: Dr Hanjie Guo

DOI: 10.5286/ISIS.E.RB1520325

ISIS Experiment Number: RB1520325

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 Alexander Christoph Komarek et al; (2015): Magnetic excitations in La1.2Sr0.8NiO4 and LaSrNiO4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1520325

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