Laminated CoZr amorphous thin-film recording heads

Recording heads with four-layer laminated CoZr/Ta films as pole pieces have been fabricated using rf sputter deposition and ion milling techniques. Typical 4πMs of 14 000 G were obtained for CoZr amorphous films compared with 10 000 G for Permalloy films. Recording tests performed with this laminate...

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Bibliographic Details
Published in:Journal of applied physics 1988-04, Vol.63 (8), p.4020-4022
Main Authors: Su, James L., Chen, Mao-Min, Lo, Jerry, Lee, Rod E.
Format: Article
Language:English
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Summary:Recording heads with four-layer laminated CoZr/Ta films as pole pieces have been fabricated using rf sputter deposition and ion milling techniques. Typical 4πMs of 14 000 G were obtained for CoZr amorphous films compared with 10 000 G for Permalloy films. Recording tests performed with this laminated CoZr/Ta film head indicate 8–12 dB better overwrite than with plated Permalloy film heads having an identical structure. However, the former exhibits a 10%–25% lower amplitude than the latter. This may be attributed to the thermal degradation of the initial permeability μi of the CoZr film during head-fabrication processes. This CoZr/Ta head also shows poorer amplitude stability than the plated Permalloy head.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.340536