Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster

Apoorva Upadhyay, Navatha Komatireddy, Alberto Ghirri, Floriana Tuna, Stuart K. Langley, Anant K. Srivastava, E. Carolina Sañudo, Boujemaa Moubaraki, Keith S. Murray, Eric J L McInnes, Marco Affronte, Maheswaran Shanmugam

    Research output: Contribution to journalArticlepeer-review


    A linear trimeric cluster of molecular formula [Ni2Gd(L -)6](NO3) (1) (L- = (C 14H12NO2) has been isolated with its structure determined via single crystal X-ray diffraction. Magnetic susceptibility measurements of 1 show that the nickel and gadolinium ions are coupled ferromagnetically, with a ground total spin state (S) of 11/2. Best fit spin Hamiltonian parameters obtained for 1 are J1(Ni-Gd) = +0.54 cm -1, g = 2.01. EPR measurements confirm a low magnetic anisotropy (D = -0.135 cm-1) for 1. Heat capacity determination of the magnetocaloric effect (MCE) parameters for 1 shows that the change in magnetic entropy (-ΔSm) achieves a maximum of 13.74 J kg-1 K-1 at 4.0 K, with the ferromagnetic coupling giving a rapid change in low applied fields, confirming the potential of Gd molecular derivatives as coolants at liquid helium temperature. © 2014 The Royal Society of Chemistry.
    Original languageEnglish
    Pages (from-to)259-266
    Number of pages7
    JournalDalton Transactions
    Issue number1
    Publication statusPublished - 7 Jan 2014


    Dive into the research topics of 'Synthesis and magnetothermal properties of a ferromagnetically coupled NiII-GdIII-NiII cluster'. Together they form a unique fingerprint.

    Cite this