Manganese containing layer for magnetic recording media

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872703

Lambeth, David N ^[1]; Lee, Li-Lien ^[2]; Laughlin, David E ^[1]

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1. Pittsburgh, PA
2. Santa Clara, CA

The present invention provides for a magnetic recording media incorporating Mn-containing layers between a substrate and a magnetic layer to provide media having increased coercivity and lower noise. The Mn-containing layer can be incorporated in a rotating, translating or stationary recording media to operate in conjunction with magnetic transducing heads for recording and reading of magnetic data, as well as other applications. The magnetic recording medium of the invention preferably includes a Co or Co alloy film magnetic layer, and Mn-containing layer, preferably comprised of VMn, TiMn, MnZn, CrMnMo, CrMnW, CrMnV, and CrMnTi, and most preferably a CrMn alloy, disposed between the substrate and the magnetic layer to promote an epitaxial crystalline structure in the magnetic layer. The medium can further include seed layers, preferably polycrystalline MgO for longitudinal media, underlayers, and intermediate layers. Underlayers and intermediate layers are comprised of materials having either an A2 structure or a B2-ordered crystalline structure disposed between the seed layer and the magnetic layer. Materials having an A2 structure are preferably Cr or Cr alloys, such as CrV, CrMo, CrW and CrTi. Materials having a B2-ordered structure having a lattice constant that is substantially comparable to that of Cr, such as those preferably selected from the group consisting of NiAl, AILCo, FeAl, FeTi, CoFe, CoTi, CoHf, CoZr, NiTi, CuBe, CuZn, A-LMn, AlRe, AgMg, and Al.sub.2 FeMn.sub.2, and is most preferably FeAl or NiAl.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, PA (United States)
• DOE Contract Number: FG02-90ER45423
• Assignee: Carnegie Mellon University (Pittsburgh, PA)
• Patent Number(s): US 5993956
• OSTI ID: 872703
• Country of Publication: United States
• Language: English

Related Subjects

manganese
containing
layer
magnetic
recording
media
provides
incorporating
mn-containing
layers
substrate
provide
increased
coercivity
noise
incorporated
rotating
translating
stationary
operate
conjunction
transducing
heads
reading
data
applications
medium
preferably
alloy
film
comprised
vmn
timn
mnzn
crmnmo
crmnw
crmnv
crmnti
crmn
disposed
promote
epitaxial
crystalline
structure
seed
polycrystalline
mgo
longitudinal
underlayers
intermediate
materials
a2
b2-ordered
alloys
crv
crmo
crw
crti
lattice
constant
substantially
comparable
selected
consisting
nial
ailco
feal
feti
cofe
coti
cohf
cozr
niti
cube
cuzn
a-lmn
agmg
femn
intermediate layers
magnetic layer
preferably comprised
recording media
lattice constant
intermediate layer
crystalline structure
magnetic recording
structure disposed
seed layer
recording medium
alloy film
preferably selected
transducing heads
mn alloy
preferably comprise
line structure
containing layer
/428/204/427/