Jump to main content
Jump to site search

Issue 1, 2014
Previous Article Next Article

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

Author affiliations

Abstract

A linear trimeric cluster of molecular formula [Ni2Gd(L)6](NO3) (1) (L = (C14H12NO2) 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.

Graphical abstract: Synthesis and magnetothermal properties of a ferromagnetically coupled NiII–GdIII–NiII cluster

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Aug 2013, accepted on 17 Sep 2013 and first published on 18 Sep 2013


Article type: Paper
DOI: 10.1039/C3DT52384E
Citation: Dalton Trans., 2014,43, 259-266
  •   Request permissions

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

    A. Upadhyay, N. Komatireddy, A. Ghirri, F. Tuna, S. K. Langley, A. K. Srivastava, E. C. Sañudo, B. Moubaraki, K. S. Murray, E. J. L. McInnes, M. Affronte and M. Shanmugam, Dalton Trans., 2014, 43, 259
    DOI: 10.1039/C3DT52384E

Search articles by author

Spotlight

Advertisements