ISIS Neutron and Muon Source Data Journal

Temperature dependence of the high-energy spin excitations in the newly discovered iron pnictide superconductor CaKFe4As4

Abstract: Understanding the magnetism in iron pnictides is one of the most important steps to reveal the mechanism of superconductivity in these novel materials. In the extensively studied 122-type iron pnictides, the total strength of high-energy spin excitations are nearly temperature independent except for the broadening in Q-space but keep as spin-wave-like behavior up to room temperature. Recently, we have successfully grown high quality, centimeter-size single crystals of CaKFe4As4 (Tc = 35 K). This provides us a new opportunity to examine the common features of spin spectrum among iron pnictides. In our previous experiments, three modes of spin resonance with odd and even L-symmetry are found below Tc. Here we propose to measure the temperature dependence of the high energy spin excitations in CaKFe4As4 using the high flux chopper MAPS / MERLIN.

Principal Investigator: Dr Hui-Qian Luo
Experimenter: Professor Tao Xie
Local Contact: Dr Toby Perring

DOI: 10.5286/ISIS.E.RB1820249

ISIS Experiment Number: RB1820249

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 Hui-Qian Luo et al; (2018): Temperature dependence of the high-energy spin excitations in the newly discovered iron pnictide superconductor CaKFe4As4, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820249

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