The role of NiAl underlayers in longitudinal thin-film recording media
作者:
C. A. Ross,
T. P. Nolan,
R. Ranjan,
D. Lu,
期刊:
Journal of Applied Physics
(AIP Available online 1997)
卷期:
Volume 81,
issue 11
页码: 7441-7444
ISSN:0021-8979
年代: 1997
DOI:10.1063/1.365285
出版商: AIP
数据来源: AIP
摘要:
Longitudinal recording media made with chromium and with nickel-aluminum underlayers are compared. NiAl films have smaller grains and random crystallographic orientation, while Cr films have larger grains and either a {110} or a {200} preferred orientation depending on the deposition conditions. Cobalt alloy films grown on NiAl have nearly random crystallographic orientation and significantc-axis out-of-plane component, and lower hysteresis loop squareness and coercivity than films made on a heated Cr underlayer. NiAl-underlayer media do not exhibit in-plane magnetic anisotropy induced by the substrate texture lines. CoCrTaPt/Cr/NiAl media had higher overwrite than CoCrTaPt/Cr media due to higher coercive squareness and a sharper hysteresis loop closure. ©1997 American Institute of Physics.
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