TITLE

Contribution of the magnetic anisotropy of the stabilization layer to the thermal stability of synthetic ferrimagnetic media

AUTHOR(S)
Acharya, B. Ramamurthy; Ajan, Antony; Abarra, E. Noel; Inomata, Akihiro; Okamoto, Iwao
PUB. DATE
January 2002
SOURCE
Applied Physics Letters;1/7/2002, Vol. 80 Issue 1, p85
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A study is reported on synthetic ferrimagnetic media, which is made of an initial or stabilization magnetic layer (L1) closer to the substrate and a thicker top magnetic layer (L2) separated by a Ru spacer layer. The effects of the magnetic anisotropy (K[sub u-L1]) and the thickness (t[sub L1]) of the stabilization layer on the thermal stability of synthetic ferrimagnetic media are systematically studied. The magnetic anisotropy K[sub U-L1] is varied by changing the Pt content of CoCrPtB alloy while a constant thickness and the same composition are retained for the L2. Media coercivity, stabilization factor K[sub U]V/k[sub B]T, and thermal stability increase as a function of t[sub L1]. For a particular t[sub L1] value, these factors are improved for higher K[sub u-L1], though the interlayer antiferromagnetic coupling strength is decreased due to compositional changes.
ACCESSION #
5792078

 

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