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High Density Magnetic Recording. Recent Developments in Magnetic Tapes, Discs and Heads

Chapter
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 92)

Abstract

Magnetic recording technology, i.e. electrical signals recorded onto a magnetic medium in the form of magnetic remanence signals produced by a magnetic head, was primarily invented by Poulsen at the end of the 19th century. He recorded audio signals on a steel wire by a pole-type electromagnet. Present day audio-tape recorders (ATR) were completed and put into practical use just after the invention of magnetic tapes and ring-type magnetic heads in the 1930s. In the 1950s, video-tape recorders (VTR) and magnetic disc drives (MDD) used as computer peripherals were invented and used widely in industry. Today VTR and MDD have become popular and are widely used consumer products. In many fields of social activities, one has to appreciate the convenient tools arising from magnetic recording technology such as magnetic cards for various vending machines, tickets, certificates, magnetic scales for NC-machines, as well as the ATR, VTR and MDD mentioned above.

Keywords

Magnetic Tape Magnetic Layer Magnetic Recording Magnetic Medium Track Width 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag Berlin Heidelberg 1991

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