TITLE

Dynamic orientation ratio in longitudinal recording media

AUTHOR(S)
Piramanayagam, S.N.; Yin, J.H.; Zhao, H.B.; Kasim, J.; Chen, Y.J.; Zhang, J.; Hee, C.H.
PUB. DATE
August 2003
SOURCE
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1175
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The origin of orientation ratio (OR) in longitudinal recording media has been controversial in the literature. In the past, the observation of a higher OR for thinner magnetic films has been attributed to stress or thermal effects. Our measurements, carried out over a larger range of time scales, confirm that the thermal effects play a major role in the observation of a higher OR for thinner magnetic films. We point out that the OR is dynamic and follows a ln(t) behavior at larger time scales (5–1000 s). Our studies indicate that a larger OR and a more dynamic behavior of OR will be observed when K[sub u]V/k[sub B]T values are smaller. We also propose that the slope of dynamic OR can be used to compare the recording performance of media indirectly. © 2003 American Institute of Physics.
ACCESSION #
10465388

 

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