L. Thomas et al., LOCALIZATION OF SPIN-WAVES IN NANOCRYSTALLIZED FILMS OF NICKEL, Journal of magnetism and magnetic materials, 140, 1995, pp. 1983-1984
Low-temperature magnetization experiments performed at different field
s in nanocrystallized nickel films have been interpreted in terms of t
he random anisotropy model. We find a good agreement, showing that int
er-grain spin waves are localized in low fields and delocalized in lar
ger fields, as was recently observed in amorphous alloys.