Electron paramagnetic resonance of solid surfaces

The current state of studies of solid surfaces by EPR is reviewed. The methodological problems of theory and experiment that are specific or important for studying surfaces are examined. Concrete results are presented for most studied substances. Comparison of the levels of study of paramagnetic centers in the bulk and at the surface has shown that studies lag substantially in the latter case in comparison with the former. The reasons for this situation are analyzed and pathways for further studies are discussed.