Metamagnetism in a coordination polymer built of trimeric cobalt units and melamine.
R Soc Open Sci
; 10(11): 230910, 2023 Nov.
Article
em En
| MEDLINE
| ID: mdl-38026015
ABSTRACT
A coordination polymer of linear trimeric cobalt units and melamine has been synthesized. The magnetic isotherms of violet coloured crystals as long as 400 µm show a field-induced transition in an external field of about 2 T at temperatures approximately below 2 K. It is addressed that by assuming the coexistent positive and negative exchange between the nearest-neighbour spins in the linear trimer, this metamagnetism can be interpreted as a transition from antiferromagnetic to ferromagnetic exchange within each trimeric spin cluster. Although weak inter-cluster or inter-chain exchange to yield a long-range magnetic order is another possible and often attributed origin of metamagnetism in low-dimensional spin systems, this study demonstrates the significance of the exchange flip within each cluster in clustered spin networks.
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MEDLINE
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En
Ano de publicação:
2023
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Article