FIELD: instrumentation engineering; erasing records from magnetic media. SUBSTANCE: method involves magnetization of magnetic medium to saturated level and its demagnetization over entire space by means of train of unlike-polarity damping pulses built up in oscillatory circuit. Novelty is that magnetic medium is magnetized to saturated level by magnetic field pulse set up due to discharge of polar capacitor through inductance coil and through oscillatory-circuit capacitor. The latter is made in the form of single- ended flat helical coil. Vector of built-up field intensity is oriented perpendicular to magnetic medium plane. Device implementing this method makes it possible to fully demagnetize medium upon completion of demagnetizing process. EFFECT: enhanced data erasing efficiency. 2 cl, 2 dwg
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