Improved media performance in optimally coupled exchange spring layer media

Applied Physics Letters

Volumn 93, Issue 12, 2008, Pages

  Berger, A ^a,c   Supper, N ^a   Ikeda, Y ^a   Lengsfield, B ^a   Moser, A ^a,b   Fullerton, E E ^a,d  

^a HITACHI AMERICA LTD   (United States)

^b UNIVERSITY OF CALIFORNIA   (United States)

^c CIC NANOGUNE   (Spain)

^d WESTERN DIGITAL CORPORATION   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

HARD DISK STORAGE; SPRINGS (COMPONENTS);

AREAL DENSITIES; EXCHANGE SPRINGS; HARD DISK DRIVE; HIGH AREAL DENSITY; INTERLAYER COUPLING; LAYER MEDIA; MEDIA NOISES; NON-MAGNETIC; RECORDING PERFORMANCE; SUBSTANTIAL IMPROVEMENT;

SYSTEM THEORY;

EID: 52949129098     PISSN: 00036951     EISSN: None     Source Type: Journal    
DOI: 10.1063/1.2985903     Document Type: Article

References (22)

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19. In a recent paper by J. P. Wang, W. Shen, and S. Y. Hong, IEEE Trans. Magn. 43, 682 (2007), the authors demonstrate writeablity improvement of an ESL-type structure in comparison to a reference media. However, in their study, the reference media consist only of the magnetically hard RL and does not have any soft magnetic ESL attached to it. Thus, their observation cannot distinguish between the writeability advantage of nonuniform magnetization reversal in an optimally tuned ESL-structure and the rather trivial write field reduction due to the simple addition of a soft magnetic layer by means of lowering the average film anisotropy.
20. No systematic variation of KV was observed upon changing the CL thickness in our experiment. Signal decay measurements corroborated media stability for all disks presented in this study.
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