ISIS Neutron and Muon Source Data Journal

The magnetic structure of FeSe superconductor under pressure

Abstract: Magnetism is in general a key ingredient for high-Tc superconductors because the corresponding spin fluctuations could mediate electronic Cooper pairing. FeSe with a nematic order of 90 K exhibits Neel and stripe spin fluctuations with no magnetic phase transition at ambient pressure. The Tc of FeSe can be dramatically enhanced by hydrostatic pressure, accompanied by the development of a magnetic order above ~ 1.2 GPa. Determining the pressure-induced magnetic structure is thus of particular interest, while neutron diffraction measurements are still lacking due to techinal difficulties. Recent muSR study revealed the static magnetism in Fe(Se,S) at lower pressure of 0.6 GPa, we therefore propose a neutron powder diffraction experiment in the helium pressure cell. Our results will be crucial for elucidating the magnetism and its interplay with nematicity and superconductivity in FeSe.

Principal Investigator: Dr Hongliang Wo
Local Contact: Dr Pascal Manuel
Experimenter: Mr Jun Zhao
Experimenter: Miss Yimeng Gu

DOI: 10.5286/ISIS.E.RB2220344

ISIS Experiment Number: RB2220344

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 Hongliang Wo et al; (2023): The magnetic structure of FeSe superconductor under pressure, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2220344

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