10 Gbit/in.2 longitudinal media on a glass substrate (invited)

Michael Madison; Jinshan Li; M. Mirzamaani; Xiaoping Bian; M. Doerner; Shanlin Duan; Kai Tang; Michael F. Toney; Tom Arnoldussen

doi:10.1063/1.370345

Abstract

This article reports on the properties of the media prepared on glass substrates which were used in IBM’s 10 Gbit/in.2 demonstration. In order to support a linear density of 315 kbpi and a track density of 33 ktpi, the remanant coercivity Hcr and remanant moment thickness product Mrt of the magnetic layer were 3450 Oe and 0.37 memu/cm2, respectively. The media used a NiAl seed layer, a CrV underlayer, a Co alloy magnetic layer, and a carbon overcoat protection layer. The magnetic film had a grain size of 12 nm as observed by transmission electron microscopy. The preferred orientation (PO) of the magnetic layer was (101̄0). This PO enables one to sustain high coercivities at low values of Mrt. It is observed that the c-axis in-plane texture of the magnetic layer is critical to achieve a low noise medium. Using a focused-ion-beam (FIB) trimmed giant magnetoresistance head and conventional partial response maximum likelihood channel, the on-track-error rates were measured at the 10−10 level.

Keywords

Materials scienceCoercivityTransmission electron microscopyLayer (electronics)Substrate (aquarium)Grain sizeGiant magnetoresistanceArea densityComposite materialMagnetic force microscopeMagnetoresistanceCondensed matter physicsMagnetizationMagnetic fieldNanotechnology

Affiliated Institutions

IBM (United States) US

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Publication Info

Year: 1999
Type: article
Volume: 85
Issue: 8
Pages: 4286-4291
Citations: 75
Access: Closed

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APA Style

                            
                                
                                    Michael Madison, 
                                
                                    Jinshan Li, 
                                
                                    M. Mirzamaani
                                
                                et al.
                            
                            (1999). 
                            10 Gbit/in.2 longitudinal media on a glass substrate (invited). 
                            Journal of Applied Physics
                            , 85
                            (8)
                            , 4286-4291.
                            https://doi.org/10.1063/1.370345
                        

Identifiers

DOI: 10.1063/1.370345

Data Quality

Data completeness: 77%