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Article | REF: IN134 V1

Magnetography

Authors: Alexandre DEKENS, Thomas HAUET, Eric AUBRY, Nathalie LAPOUGE, Michel HEHN

Publication date: September 10, 2020

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2. Technical description

2.1 Magnetic medium

The heart of any magnetic printer is the magnetic medium that records the latent magnetic information in the form of a matrix made up of zones, called dots, with strong magnetic field gradients on a microscopic scale. In order to meet these specifications, the recording layer must be made of a hard ferromagnetic material (whose coercive field µ 0 H c is greater than around 10 mT, figure 2 )

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