Low temperature heat capacity and magnetic susceptibility of the DPPH–benzene complex

摘要: An experimental study of the heat capacity in fields 0 and 50 kOe from 0.55 to 20 K powder magnetic susceptibility 0.4 room temperature DPPH–benzene complex is reported. Magnetic lattice contributions are well resolved. The compared with pair, chain, quadratic net Heisenberg model predictions, none which give satisfactory agreement experiment. Calculations based on McConnell’s spin density Hamiltonian indicate likelihood that dominant intermolecular exchange coupling comparable magnitude six near neighbors, layers separated adjacent by benzene solvent molecules.