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A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene

Berlie, A.; Terry, I.; Szablewski, M.

A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene Thumbnail


Authors

A. Berlie



Abstract

Variable temperature SQUID magnetometry measurements were made on a sample of commercially available nickel bis-1,5-cyclooctadiene (Ni(COD)2) is reported. The material is shown to be a mixed phase magnetic system where the Ni(COD)2 behaves as a diamagnet containing a paramagnetic component at low temperatures which we believe consists of elemental Ni clusters arising from the decomposition of the material. The magnetic response of the Ni clusters can be described by the combination of two Langevin functions, which indicate cluster magnetic moments of 1.8 μ B and 15 μ B suggesting Ni n clusters with n = 2–3 and n = 14–19. However, we demonstrate that these clusters appear to show a spin transition to an S = 0 state at low temperatures, which may be a consequence of interactions between the clusters and the surrounding organic medium. Nevertheless, our results suggest that Ni(COD)2 is a novel material for the study of Ni clusters embedded in a diamagnetic background material.

Citation

Berlie, A., Terry, I., & Szablewski, M. (2013). A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene. Journal of Cluster Science, 24(4), 1057-1066. https://doi.org/10.1007/s10876-013-0597-9

Journal Article Type Article
Publication Date Dec 1, 2013
Deposit Date Nov 13, 2014
Publicly Available Date Nov 20, 2014
Journal Journal of Cluster Science
Print ISSN 1040-7278
Electronic ISSN 1572-8862
Publisher Springer
Peer Reviewed Peer Reviewed
Volume 24
Issue 4
Pages 1057-1066
DOI https://doi.org/10.1007/s10876-013-0597-9
Keywords Magnetism, Nickel clusters, Nickel bis-1,5-cyclooctadiene, Ni(COD)2.
Public URL https://durham-repository.worktribe.com/output/1417864

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