Read/write track fringe effect of thin film and mr heads with different pole shapes

Terumitsu Tanaka, Kohei Wakamiya, Toshiyuki Suzuki

Research output: Contribution to journalArticlepeer-review


Measuring the cross-track profiles of a microtrack created by DC erasing both sides of a recorded track, the linear recording density dependence of the written track fringe width and that of the read track fringe width were successfully separated, both of which are usually observed in combination. It was clarified that when a thin-film head is used for reading, the read track fringe width increases as the linear recording density decreases, whereas it remains almost constant when an MR head with wide shielding layers is used. It was also clarified that the record head fringe width for a thin-film inductive head is less dependent on the linear recording density. The effects of several heads with different pole shapes on track edge phenomena were also evaluated, by partially DC erasing a written track from the track edge and measuring the change in the residual track output. It was found that the fringe field width of a record head changes depending on the pole shape, and the trimming of record head poles is very effective in reducing head field fringe effects.

Original languageEnglish
Pages (from-to)2165-2170
Number of pages6
JournalIEICE Transactions on Electronics
Issue number12
Publication statusPublished - 1999

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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