Author:

Keywords:

Science & Technology, Technology, Physical Sciences, Materials Science, Multidisciplinary, Physics, Condensed Matter, Materials Science, Physics, 0204 Condensed Matter Physics, 0912 Materials Engineering, 0913 Mechanical Engineering, Applied Physics, 4016 Materials engineering, 5104 Condensed matter physics

Abstract:

Susceptibility and ESR measurements are performed on single crystals of solvent-free 2,2-diphenyl-l-picrylhydrazyl (DPPH) between 1.5 and 300 K. The susceptibility measurements are explained by a pair model but 4% nonpairing paramagnetic centres are observed at low temperatures. These centres probe the dynamics of the spin system and the ESR line width data may be explained by a low-dimensional diffusion model. © 1983.