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dc.contributor.advisor Lairson, Bruce M.
dc.creatorHo, Kuok San
dc.date.accessioned 2009-06-04T08:09:13Z
dc.date.available 2009-06-04T08:09:13Z
dc.date.issued 1998
dc.identifier.urihttps://hdl.handle.net/1911/19269
dc.description.abstract Perpendicular recording has the potential to achieve high-density data storage. As the linear density approaches to the superparamagnetic limit, traditional longitudinal recording may give way to perpendicular recording. This study investigated the possibility of using perpendicular multilayers as an alternative magnetic storage medium. Various cobalt based perpendicular multilayers were deposited. The macro-magnetic properties of the thin films were characterized using switching ratio and $\rm\delta M$ curves. The experimental measurements were correlated with the read/write recording tests. Medium noise analysis on perpendicular multilayers was performed in both time-domain and frequency-domain. The time-domain eigenvector expansion technique was adopted and extended for use in perpendicular recording. In addition, recording non-linearities from perpendicular multilayers have been measured by using pseudo-random binary sequence and the third harmonic ratio measurement. The readback non-linearity of MR head was characterized using a polynomial equation. Both the NLTS and partial erasure measurements show advantages for perpendicular recording compared to longitudinal. Finally, by constructing transformation filters, we demonstrated magnetic recording on perpendicular media via conventional longitudinal channels. A linear recording density of 204 kbpi has been obtained in a peak detection channel while a linear density of 350 kbpi was demonstrated on a partial response maximum likelihood (PRML) channel.
dc.format.extent 144 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectElectronics
Electrical engineering
Physics
Electromagnetics
Engineering
Materials science
dc.title Magnetic recording on co-alloy perpendicular multilayers
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Physics
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation Ho, Kuok San. "Magnetic recording on co-alloy perpendicular multilayers." (1998) Diss., Rice University. https://hdl.handle.net/1911/19269.


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