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New solutions for perpendicular magnetic recording media

H. GAVRILA1,*

Affiliation

  1. University “Politehnica” of Bucharest, Splaiul Independenei 313, RO-060042, Romania

Abstract

While the most promising longitudinal recording systems cannot surpass the theoretical limit of about 200 Gb/in2 for areal recording density and the demand for higher densities is permanently increasing, it is evident that the perpendicular magnetic recording constitutes the realistic issue to the longitudinal one. The perpendicular magnetic recording offers significant advantages relative to the previous conception, among them the most important being stronger write and read fields, and therefore the use of media of higher anisotropy, smaler grain size, higher signal-to-noise ratio, and a better thermal stability. Unfortunately, the perpendicular recording has to cope some important physical and technological difficulties. To overcome them, many ingenious solutions were recently proposed. Two of these proposals, regarding the perpendicular media, are analysed in the paper: the composite media and the coupled granular/continuous media..

Keywords

Perpendicular magnetic recording, Composite media, Coupled granular/continuous media.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

H. GAVRILA, New solutions for perpendicular magnetic recording media, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 449-454 (2006)