Materials and processing aspects of CoCrTa/Cr longitudinal recording media. I. Processing and magnetic properties

1994 ◽  
Vol 76 (12) ◽  
pp. 8167-8173 ◽  
Author(s):  
Y. Shen ◽  
D. E. Laughlin ◽  
D. N. Lambeth
Keyword(s):  
Magnetic Properties ◽  
Recording Media ◽  
Longitudinal Recording

scholarly journals Effects of Alloying and Processing on the Microstructure and Magnetic Properties of CoCr(PtTa) Longitudinal Recording Media

2003 ◽  
Vol 9 (S02) ◽  
pp. 516-517
Author(s):  
J.F. Al-Sharab ◽  
J.E. Wittig ◽  
J. Bentley ◽  
G.A. Bertero ◽  
P.C. Dorsey ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Recording Media ◽  
Longitudinal Recording ◽  
Microstructure And Magnetic Properties

Correlation of microstructural and magnetic properties of longitudinal recording media using TEM

1993 ◽  
Vol 51 ◽  
pp. 1016-1017
Author(s):  
T. P. Nolan ◽  
R. Sinclair ◽  
T. Yamashita ◽  
R. Ranjan
Keyword(s):  
Magnetic Properties ◽  
Indirect Comparison ◽  
Disk Drive ◽  
Dark Field ◽  
Low Noise ◽  
Recording Media ◽  
Processing Conditions ◽  
Longitudinal Recording ◽  
Highly Correlated ◽  
Processing Properties

Cobalt alloy on chromium thin film media are used in industry because of their large values of coercivity (Hc), remanent magnetization (Mr), squareness (S*), and relatively low noise. The magnetic properties depend strongly on processing conditions and, as will be shown, the resulting microstructure.A complete structure-processing-properties analysis requires effective measurement of both magnetic and microstructural properties. Direct micromagnetic-microstructural comparison is not yet readily available, but bulk hysteresis loop parameters are reproducible and highly correlated with both desired recording characteristics and microstructures, and so provide a valuable, albeit indirect comparison. Signal to noise (S/N) measurements are also used as a more direct measure of usefulness in a high density disk drive. The nanoscale microstructural features which dramatically affect these bulk magnetic properties are difficult to observe. However, careful combination of TEM techniques, including bright-field, dark-field, high-resolution, selected area diffraction and elongated-probe microdiffraction can determine the subtle microstructural differences.

Magnetic properties and microstructure of CoCrW films for longitudinal recording media

1995 ◽  
Vol 31 (6) ◽  
pp. 2839-2841 ◽  
Author(s):  
T. Miyamoto ◽  
J. Nakai ◽  
H. Matsumura ◽  
K. Yoshikawa ◽  
M. Kuwabara ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Recording Media ◽  
Longitudinal Recording
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