Manganese containing layer for magnetic recording media
Abstract
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 preferablymore »
- Inventors:
-
- Pittsburgh, PA
- Santa Clara, CA
- Issue Date:
- Research Org.:
- Carnegie-Mellon Univ., Pittsburgh, PA (United States)
- OSTI Identifier:
- 872703
- Patent Number(s):
- 5993956
- Assignee:
- Carnegie Mellon University (Pittsburgh, PA)
- Patent Classifications (CPCs):
-
G - PHYSICS G11 - INFORMATION STORAGE G11B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- DOE Contract Number:
- FG02-90ER45423
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 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/
Citation Formats
Lambeth, David N, Lee, Li-Lien, and Laughlin, David E. Manganese containing layer for magnetic recording media. United States: N. p., 1999.
Web.
Lambeth, David N, Lee, Li-Lien, & Laughlin, David E. Manganese containing layer for magnetic recording media. United States.
Lambeth, David N, Lee, Li-Lien, and Laughlin, David E. Fri .
"Manganese containing layer for magnetic recording media". United States. https://www.osti.gov/servlets/purl/872703.
@article{osti_872703,
title = {Manganese containing layer for magnetic recording media},
author = {Lambeth, David N and Lee, Li-Lien and Laughlin, David E},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 1999},
month = {Fri Jan 01 00:00:00 EST 1999}
}
Works referenced in this record:
Role of Microstructural Phenomena in Magnetic Thin Films. Final Report
report, April 2001
- Laughlin, D. E.; Lambeth, D. N.
Interdiffusion and grain isolation in Co/Cr thin films
journal, January 1994
- Feng, Y. C.; Laughlin, D. E.; Lambeth, D. N.
- IEEE Transactions on Magnetics, Vol. 30, Issue 6