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15 January 1996 Read heads for magnetic tapes
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Read heads for use with magnetic tape in the past have used magnetic inductive devices. More recently however there has been a migration to magnetoresistive flux sensing devices using primarily the anisotropic magnetoresistance (MR) effect in thin permalloy stripes. High end digital data tape storage systems currently use arrays of MIR read heads for parallel track readback of magnetic transitions on tape. With the rapidly increasing track and bit density, the higher output afforded by MIR sensors and the ability to readily form them into multi-track arrays has made them the device of choice for tape read heads in digital magnetic recording. Both inductive and MIR read heads are reviewed here with discussion on the various types and design issues with an emphasis on MIR heads. In the near future it is envisaged that the recently discovered giant magnetoresistance (GMR) phenomena will be implemented in read heads in both tape and disk applications for very high areal density magnetic storage.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Richard H. Dee "Read heads for magnetic tapes", Proc. SPIE 2604, High-Density Data Recording and Retrieval Technologies, (15 January 1996);

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