Symmetry analysis of electronic states for crystals with spiral magnetic order. II. Connection with limiting cases

For pt.I see ibid., vol.3, p.8565 (1991). Compatibility relations between the electronic states of crystals with spiral magnetic order and the states of non-magnetic ferromagnetic and antiferromagnetic crystals are discussed. The results thus obtained permit one to predict the character of the electronic spectrum change on transition from a limiting case to a spiral structure. An anomaly in the optical characteristics of heavy rare-earth metals, which is observed on transition from the ferromagnetic structure to a spiral structure, is interpreted.