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Issue 8, 2016
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Observation of the influence of dipolar and spin frustration effects on the magnetocaloric properties of a trigonal prismatic {Gd7} molecular nanomagnet

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Abstract

We report the synthesis and structure of a molecular {Gd7} cage of the formula (iPr2NH2)6[Gd73-OH)3(CO3)6(O2CtBu)12] which has crystallographic C3h symmetry. Low temperature specific heat and adiabatic demagnetization experiments (the latter achieving temperatures below 100 mK), lead to the observation of the effects of both intramolecular dipolar interactions and geometric spin frustration. The dipolar interaction leads to a massive rearrangement of energy levels such that specific heat and entropy below 2 K are strongly modified while magnetic susceptibility and magnetization above 2 K are not affected. The consequences of these phenomena for low temperature magnetocaloric applications are discussed.

Graphical abstract: Observation of the influence of dipolar and spin frustration effects on the magnetocaloric properties of a trigonal prismatic {Gd7} molecular nanomagnet

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Publication details

The article was received on 30 Mar 2016, accepted on 22 Apr 2016, published on 25 Apr 2016 and first published online on 25 Apr 2016


Article type: Edge Article
DOI: 10.1039/C6SC01415A
Citation: Chem. Sci., 2016,7, 4891-4895
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    Observation of the influence of dipolar and spin frustration effects on the magnetocaloric properties of a trigonal prismatic {Gd7} molecular nanomagnet

    E. M. Pineda, G. Lorusso, K. H. Zangana, E. Palacios, J. Schnack, M. Evangelisti, R. E. P. Winpenny and E. J. L. McInnes, Chem. Sci., 2016, 7, 4891
    DOI: 10.1039/C6SC01415A

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