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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

AuthorsMoreno Pineda, Eufemio; Lorusso, Giulia; Zangana, Karzan H.; Palacios, Elias; Schnack, Jürgen; Evangelisti, Marco; Winpenny, Richard E. P.; Mclnnes, Eric J. L.
Issue Date2016
PublisherRoyal Society of Chemistry (Great Britain)
CitationChemical Science 7(8): 4891-4895 (2016)
AbstractWe report the synthesis and structure of a molecular {Gd7} cage of the formula (iPr2NH2)6[Gd7(μ3-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.
Publisher version (URL)https://doi.org/10.1039/c6sc01415a
Identifiersdoi: 10.1039/c6sc01415a
e-issn: 2041-6539
issn: 2041-6520
Appears in Collections:(ICMA) Artículos
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