Low noise magnetic recording media having a interlayer film
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 12, 2002
Grant Date -
N/A
app pub date -
Mar 16, 2000
filing date -
Mar 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetic recording medium using a nonmagnetic interlayer in between a Cr-base underlayer and a Co magnetic layer is disclosed. The nonmagnetic interlayer comprises Co.sub.1-.alpha.-.beta.-.gamma.-.zeta. Cr.sub..alpha. X.sub..beta. Y.sub..gamma. Z.sub..zeta.. X is a material selected from Ni or Fe so as to substitute a portion of Cr composition. Y is a material selected from materials which can form a solid solution with at least one of list materials consisting of Ni, Fe, Co, and Cr. The Y materials added in the interlayer is to adjust the lattice mismatch of interface between the interlayer and the underlayer to a magnitude so that the interlayer formed on the underlayer at least is a texture layer, an epitaxial layer is best preferred. However, Z is a material which is insoluble with any of above list materials, Cr, Co, X, and Y in a solid state so as to form precipitates, thereby inhibiting the grain growth. In a preferred embodiment, the .alpha., .beta., .gamma., and .zeta. are about 25-41%, 0.1-5%, 0.1-5%, and 0.1-5%, respectively. The interlayer thickness is of between about 0.5-20 nm.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully