Quantum Spin 1/2 Dimers in a Low Dimensional Tetrabromocuprate Magnet

Sampson, Gavin; Bristowe, Nicholas C.; Carr, Sam T.; Saib, Asad; Stenning, Gavin B.G.; Clark, Ewan R.; Saines, Paul James

doi:10.1002/chem.202200855

Quantum Spin 1/2 Dimers in a Low Dimensional Tetrabromocuprate Magnet

Sampson, Gavin; Bristowe, Nicholas C.; Carr, Sam T.; Saib, Asad; Stenning, Gavin B.G.; Clark, Ewan R.; Saines, Paul James

Authors

Gavin Sampson

Dr Nicholas Bristowe nicholas.bristowe@durham.ac.uk
Associate Professor

Sam T. Carr

Asad Saib

Gavin B.G. Stenning

Ewan R. Clark

Paul James Saines

Abstract

This work describes a homometallic spin-urn:x-wiley:09476539:media:chem202200855:chem202200855-math-0001 tetrabromocuprate adopting a bilayer structure. Magnetic-susceptibility measurements show a broad maximum centred near 70 K, with fits to this data using a Heisenberg model consistent with strong antiferromagnetic coupling between neighbouring copper atoms in different layers of the bilayer. There are further weak intralayer ferromagnetic interactions between copper cations in neighbouring dimers. First-principles calculations are consistent with this, but suggest there is only significant magnetic coupling within one direction of a layer; this would suggest the presence of a spin ladder within the bilayer with antiferromagnetic rung and weaker ferromagnetic rail couplings.

Citation

Sampson, G., Bristowe, N. C., Carr, S. T., Saib, A., Stenning, G. B., Clark, E. R., & Saines, P. J. (2022). Quantum Spin 1/2 Dimers in a Low Dimensional Tetrabromocuprate Magnet. Chemistry - A European Journal, 28(32), Article e202200855. https://doi.org/10.1002/chem.202200855

Journal Article Type	Article
Acceptance Date	Mar 30, 2022
Online Publication Date	Apr 27, 2022
Publication Date	Jun 7, 2022
Deposit Date	Apr 6, 2022
Publicly Available Date	Jun 23, 2022
Journal	Chemistry – A European Journal
Print ISSN	0947-6539
Electronic ISSN	1521-3765
Publisher	Wiley
Peer Reviewed	Peer Reviewed
Volume	28
Issue	32
Article Number	e202200855
DOI	https://doi.org/10.1002/chem.202200855

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© 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH

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