Antiferromagnetic resonance studies in molecular magnetic materials Original Research Article

EPR spectroscopy has become an increasingly powerful tool to examine the spin states and dynamics of single-molecule magnets, but has not been exploited to probe bulk magnetically ordered phases of molecular magnets. In this article, we review the EPR spectra of antiferromagnets and canted antiferromagnets below TN with particular reference to our own studies on the canted antiferromagnet, p-NCC6F4CNSSN (TN=36 K). The antiferromagnetic resonance experiment allows the saturation of the sublattice magnetisation to be probed. In addition, the exchange and anisotropy fields (He and Ha), the spin-flop field (Hsf) and for canted antiferromagnets, the Dzyaloshinskii–Moriya field (HDM), which gives rise to the spontaneous moment, can be determined.