Reduction of remanence in CoCrTaPt high density recording media by pulse field

The distributions of M/K-u = 2/H-k (peak at about 4.3 A m(2)/J = 4.3 x 10(-4) emu/erg) for an ensemble of independent ferromagnetic single domain grains with in-plane uniaxial anisotropy in CoCrTaPt high density recording media are deduced by analyzing remanent magnetization after application of pulse fields. In the 20 nm thick film there is a tail at the low value side of the distribution, which disappears in the 36 nm thick film where grain growth seems to be more complete. (C) 1999 Published by Elsevier Science B.V. All rights reserved.