The magnetic field dependence of the dynamic elastic modulus (Delta E effec
t) was studied in ball-milled nanocrystalline Nickel, as a function of the
milling times and annealing treatments. The analysis of the crystallite siz
e and internal strains has been performed as well by Fourier analysis of th
e X-ray spectra. A correlation between Delta E and the lattice strain calcu
lated by X-ray analysis is observed, suggesting that the magnetic anisotrop
y is mainly determined by the infernal strains. (C)1999 Acta Metallurgica I
nc.