ISIS Neutron and Muon Source Data Journal
This is a page describing data taken during an experiment at the ISIS Neutron and Muon Source. Information about the ISIS Neutron and Muon Source can be found at https://www.isis.stfc.ac.uk.
Investigation of the high temperature magnetic transition in CuTCNQ Phase II
Abstract: Copper-7,7,8,8-tetracyanoquinodimethane (CuTCNQ) is a material that has attracted much interest for its electrical resistance switching. The material is a charge transfer salt consisting of a conducting, kinetic phase ("phase I") and an insulating, thermodynamic phase ("phase II"), both of which have been proposed to be involved with the resistive switching process. In addition to the interesting electrical properties, both phases exhibit quite different magnetic properties, with the phase 2 material showing a well-defined magnetic ordering below 11K, measurements suggesting antiferromagnetism with a small ferromagnetic component, possibly from a small deviation from the collinearity of the free radical electrons' magnetic moments. Earlier zero field (ZF) muon spin spectroscopy (MSS) measurements by us have revealed possible evidence of a second, weak, magnetically ordered component within the material, that may exist between 11K and at least 150K, but not at 300K. However, this magnetic state may in fact be nuclear in origin, though close inspection of magnetic susceptibility data suggest a subtle change in the electronic magnetic response between 200K and 300K. We would therefore like to measure ZF MSS at ten temperatures between 250K and 320K to confirm the existence of this apparent high temperature magnetically ordered phase, investigate the point at which is suppressed and determine whether it has a nuclear origin.
Principal Investigator: Dr Ian Terry
Experimenter: Professor Marek Szablewski
Local Contact: Dr Adam Berlie
Experimenter: Miss Yihan Zhai
DOI: 10.5286/ISIS.E.RB2520545
ISIS Experiment Number: RB2520545
| Part DOI | Instrument | Public release date | Download Link |
|---|---|---|---|
| 10.5286/ISIS.E.RB2520545-1 | EMU | 11 December 2028 | Download |
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 Ian Terry et al; (2025): Investigation of the high temperature magnetic transition in CuTCNQ Phase II, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB2520545
Data is released under the CC-BY-4.0 license.
