A perpendicular head design for an areal density of 1 TBPSI

Mohammed S. Patwari, R. H. Victora

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A novel perpendicular recording head consisting of write pole, collector pole and soft underlayer has been conceived and developed using a 3D self consistent micromagnetic model. The head has been designed to yield an areal density of 1 terabits/in2. To achieve such ultra high areal density, the recording head is required to write on a 50 nm wide track. Taking the technological roadmap into consideration, the specifications were set for the medium thickness to be 25 nm and air bearing spacing equal to 5 nm. Reluctance arguments show that the presence of a recording medium of relative permeability 2-3 effectively reduces the vertical distance between head and soft underlayer to 15 nm. The proposed recording head consists of a probe type pole tip of higher saturation Ms of 24 kG, protruding from a large drive head of smaller saturation Ms of 10 kG. The design is based on the premise that the drive head provides the bulk of the writing field and the pole tip enhances the field gradient. The head geometry and the magnetic parameters have been varied to yield an optimum design in terms of peak field, peak field gradient and thermal stability.

Original languageEnglish (US)
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
EditorsJ. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
DOIs
StatePublished - 2002
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: Apr 28 2002May 2 2002

Publication series

NameINTERMAG Europe 2002 - IEEE International Magnetics Conference

Other

Other2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
CountryNetherlands
CityAmsterdam
Period4/28/025/2/02

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