Researches of magnetic properties of thin-film materials of the modern hard magnetic disks in case of influence of an outside impulse magnetic field

Аuthors

Hlopov B. V.

Abstract

The bench for research of the parameters defining stability of magnetic properties of thin-film materials of the modern hard magnetic disks in case of impact on them of an outside impulse magnetic field is developed and created. Techniques of an assessment of the magnetic fields providing safe erasing of information from carriers on rigid magnetic carriers (NZhMD), in particular a technique of visual check of a completeness of erasing of information with use of atomic force microscopy (ASM) are developed, losses in protective casings are defined when screening magnetic fields. Offers are provided to normative documents by determination of amplitude and frequency values of strength of a periodic magnetic field and value of strength of an impulse magnetic field with an optimum pulse duration.

Keywords:

impulse magnetic field, magnetic disk, coercive force of a material, atomic force microscopy, magnetization of saturation, the magnetic relief, the guaranteed erasing of information, normative requirements.

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