Site dilution of two-dimensional honeycomb molecular ferrimagnets AFeIIFeIII(C2O4)3 (A = (n-C4H9)N, P(C6H5)4)

Literature Information

Publication Date 2001-09-11
DOI 10.1039/B103999G
Impact Factor 3.676
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Abstract

The effect of site dilution on the bulk magnetic properties of two-dimensional honeycomb ferrimagnets AFeIIFeIII(C2O4)3 (A = (n-C4H9)4N, P(C6H5)4) has been studied by substituting the FeII site with Zn and the FeIII site with Ga. In the (n-C4H9)4N compounds the critical temperature Tc falls to zero at a mole fraction of diamagnetic dopant (Zn or Ga) between 0.6 and 0.65. In the P(C6H5)4 compounds only 50% doping of FeIII with Ga is needed to suppress long-range order, probably because FeII vacancies are already present in the lattice. Monte Carlo calculations predict the quantitative variation of Tc with dilution, but experimentally the dopant has a smaller effect than predicted, possibly because the dopant ions are not randomly distributed.

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