Effect of oxygen on magnetic properties of Co–Pt–Cr–SiO2 thin films for perpendicular recording media

2005 ◽  
Vol 287 ◽  
pp. 153-158 ◽  
Author(s):  
H. Yamane ◽  
S. Watanabe ◽  
J. Ariake ◽  
N. Honda ◽  
K. Ouchi ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Recording Media ◽  
Perpendicular Recording ◽  
Effect Of Oxygen

X-ray photoelectron spectroscopy of annealed Co-Cr films

1991 ◽  
Vol 49 ◽  
pp. 750-751
Author(s):  
B.G. Demczyk ◽  
H.W. Estry
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Recording Media ◽  
Perpendicular Recording ◽  
X Ray ◽  
Alloy Target ◽  
Compositional Changes ◽  
Sputtering System

Co-Cr thin films have been studied extensively as leading candidates for perpendicular recording media. The enhancement of the magnetic properties (saturation magnetization and coercivity) in rfsputtered Co-Cr films has been reported by several investigators. Concurrent work has revealed similar improvements in the magnetic properties of annealed Co-Cr films produced by magnetron sputtering. Honda et al. propose that compositional inhomogeneities in annealed films give rise to these properties changes. In this work, we have employed X-ray photoelectron spectroscopy (XPS) to investigate compositional changes in annealed Co-Cr layers of thickness 10-200 nm.Films were deposited from a Co-22wt%Cr alloy target onto glass (Coming Type 7059) substrates using a Varian DC Magnetron ("S" gun) sputtering system. Sputtering conditions included an argon pressure of lmTorr and room temperature substrates. The sputtering rate was 0.25 nm/sec. Annealing was performed at 360°C in a vacuum (10-6 Torr) in incremental times up to 49 hours.

Magnetic Properties to Optimize the$K_u2$Effect in Perpendicular Recording Media

2006 ◽  
Vol 42 (10) ◽  
pp. 2387-2389 ◽  
Author(s):  
H. Sato ◽  
T. Shimatsu ◽  
T. Kondo ◽  
S. Watanabe ◽  
O. Kitakami ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Recording Media ◽  
Perpendicular Recording

Co3Pt Nanocomposite Films for Perpendicular Magnetic Recording Media

2010 ◽  
Vol 123-125 ◽  
pp. 27-30 ◽  
Author(s):  
Chih Long Shen ◽  
Po Cheng Kuo ◽  
S.C. Chen ◽  
C.D. Chen ◽  
S.L. Hsu ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Process Parameters ◽  
Magnetic Recording ◽  
Magnetic Layer ◽  
Nanocomposite Films ◽  
Recording Media ◽  
Magnetic Recording Media ◽  
Perpendicular Magnetic Recording ◽  
Significant Potential

The Co3Pt magnetic layer with thickness of 7~28 nm was deposited onto the Pt underlayer. The as-deposited Co3Pt/Pt double-layered films with or without a 5 nm Pt capped layer were annealed at temperatures between 275 and 375 °C in vacuum of 1 mTorr. The influences of process parameters on perpendicular magnetic properties of Co3Pt thin films were investigated. The Co3Pt film with perpendicular coercivity (Hc⊥) value of 3620 Oe and the perpendicular squareness (S⊥) of 0.7 could be achieved from the Co3Pt(18 nm)/Pt(100 nm) double-layered films by annealing at 300°C. Further added Tb30Co70 film on the Co3Pt/Pt double-layered film could greatly enhance the perpendicular magnetic properties of the film. The Hc⊥ and S⊥ of the Tb30Co70/Co3Pt/Pt film were as high as 6560 Oe and 0.88, respectively, which has significant potential to be applied in perpendicular magnetic recording media.

Co-Cr-W-C alloy thin films for perpendicular recording media

1987 ◽  
Vol 23 (5) ◽  
pp. 3651-3653 ◽  
Author(s):  
K. Inoue ◽  
M. Yoshikiyo ◽  
S. Yoshii
Keyword(s):  
Thin Films ◽  
Recording Media ◽  
Perpendicular Recording
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