The side-erasing effect in narrow track recording

The authors investigated the side-erasing effect in guardbandless azimuth recording and developed a more precise method of measuring the side-erased width. It was established that the side-erased width depends on the head shape and can be held to less than 0.5 mu m if the head is designed as suggested. It was found that when ME tape and TSS (tilted Sendust sputtered) head are used, the side-fringing field often erases about 2 mu m of the effective erased width. Analysis established that the magnitude of the side-fringing field depends on the included angle of the head core and that widening the included angle more than 90 degrees is effective in reducing the side-erased width. Therefore, for narrow track pitch recording, designing a head shape which minimizes the side-erased width is indispensable.<
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