Antiferromagnetic Resonance Studies on the Spin-Canted Molecular Magnet β-p-NCC6F4CNSSN

• Published in: The journal of physical chemistry. B Vol. 107; no. 51; pp. 14158 - 14160
• Main Authors: Alberola, Antonio, Pask, Christopher M., Rawson, Jeremy M., McInnes, Eric J. L., Wolowska, Joanna, El Mkami, Hassane, Smith, Graham
• Format: Journal Article
• Language: English
• Published: American Chemical Society 25-12-2003
• ISSN: 1520-6106; 1520-5207
• DOI: 10.1021/jp037049m

Multifrequency (24−94 GHz) and variable temperature (5−300 K) single-crystal electron paramagnetic resonance (EPR) studies have been used to probe the magnetic exchange pathway, spin dynamics, and assignment of the principal magnetic axes in the organic molecular magnet 4-(4‘-cyano-tetrafluorophenyl)-1,2,3,5-dithiadiazolyl, β-p-NCC6F4CNSSN. Orientation-dependent studies indicate that the dominant exchange pathway is perpendicular to the crystallographic c-axis, while variable-temperature studies confirm the ordering transition at 36 K and illustrate that the sublattice magnetization is essentially saturated below 15 K. The orientation dependence of the EPR spectra at 5 K has confirmed the easy axis of magnetization to be parallel to the b-axis and allowed the first determination of the intermediate and hard axes of magnetization as parallel to c- and a-axes, respectively.