ISIS Neutron and Muon Source Data Journal

Spin wave excitations in antiferromagnetic CrI2(pyz-d4)2

Abstract: Our previous INS experiments on the metal-organic ferrimagnetic compound CrCl2(pyz)2 revealed only a very weak dispersive mode below 1 meV. This energy scale is significantly lower than the critical temperature, Tc = 55K. We tentatively attribute this to the non-innocence of the pyrazine ligands: Both Cr and pyrazine have finite spin densities and the associated moments are antiparallel, giving rise to a ferrimagnetic ground state. In order to draw this conclusion with confidence, we propose to study magnetic excitations in the sister compund CrI2(pyz)2 in which there is no electron transfer from Cr to pyrazine. We expect the excitation spectrum to be conventional in this case. The expected results will allow us to gain insight into the complex role of pyrazines in this family of materials.

Principal Investigator: Dr Niels Christensen
Local Contact: Dr Helen Walker
Experimenter: Mr Wenjie Wan
Experimenter: Dr Kasper Pedersen
Experimenter: Ms Laura Voigt
Experimenter: Miss Kirstine Stampe

DOI: 10.5286/ISIS.E.RB1920693

ISIS Experiment Number: RB1920693

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 Niels Christensen et al; (2019): Spin wave excitations in antiferromagnetic CrI2(pyz-d4)2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1920693

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