Av. Andrianov, HELICAL MAGNETIC-STRUCTURES IN HEAVY RARE-EARTH-METALS AS A PROBABLE MANIFESTATION OF THE ELECTRONIC TOPOLOGICAL TRANSITION, Journal of magnetism and magnetic materials, 144, 1995, pp. 749-750
The period of the helical magnetic structure in Tb, Dy, Ho and various
Tb-Y alloys at all temperatures is determined unambiguously by the c/
a ratio of the hexagonal crystalline lattice. This may be caused by th
e electronic topological transition that occurs when c/a changes.