ISIS Neutron and Muon Source Data Journal

Completing the phase diagram of a 2D molecular antiferromagnet

Abstract: Low-dimensional quantum magnetism continues to be of great theoretical and experimental interest as reduced dimensionality supports strong quantum fluctuations which can result in novel excitations and critical behaviour. Here we propose to complete an investigation of the phase diagram of a series of molecular 2D quantum Heisenberg antiferromagnets with random exchange strengths. This is a project started at PSI by Dr Fan Xiao, where materials from the series (QuinH)2Cu(Br(1-x)Clx)4.2H2O with x < 0.5 were successfully measured. Our recent measurement at ISIS has shown magnetic order in the x=1 member of the series, but the nature of the signal brings into question whether the system is ever quantum disordered. We now seek to measure two final compounds with high Cl concentrations in order to complete our investigation of the phase diagram of the system.

Principal Investigator: Professor Tom Lancaster
Experimenter: Professor Stephen Blundell
Experimenter: Dr Paul Goddard
Experimenter: Dr Fan Xiao
Experimenter: Dr Kevin Franke
Experimenter: Dr Thomas Hicken
Experimenter: Dr Francis Pratt
Experimenter: Dr Benjamin Huddart
Local Contact: Dr Mark Telling
Experimenter: Mr William Blackmore
Experimenter: Dr Murray Wilson
Local Contact: Dr Peter Baker

DOI: 10.5286/ISIS.E.RB1810310

ISIS Experiment Number: RB1810310

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:
Professor Tom Lancaster et al; (2018): Completing the phase diagram of a 2D molecular antiferromagnet, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1810310

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