1. For a review, seeSynthetic Modulated Structures, edited by L. L. Chang and B. C. Giessen (Academic, New York, 1985).
2. K. H. J. Buschow, inFerromagnetic Materials, Vol.1, edited by E. P. Wohlfarth (North-Holland, Amsterdam, 1980) p. 297.
3. B. Dieny, D. Givord, and J. M. Ndjaka (unpublished).