Ri. Bewley et R. Cywinski, THE MAGNETIC CORRELATION RANGE IN SPEROMAGNETIC DY7-XYXNI3, Journal of magnetism and magnetic materials, 144, 1995, pp. 869-870
The spin correlation range xi in the amorphous random anisotropy magne
ts Dy7-xYxNi3 has been measured by small-angle neutron scattering. xi
is typically a few atomic spacings, as expected for a speromagnet. We
suggest that previous estimates of xi (similar to 15 nm), consistent w
ith correlated speromagnetism, may have resulted from magnetic scatter
ing associated with microcrystalline impurities in the amorphous matri
x.