Abstract
To investigate the influence of the variation of the write track width in the discrete track recording, we calculated the off-track capability (OTC) of the write/read head using Landau-Lifshitz-Gilbert micromagnetic simulations. Recently, the OTC has become increasingly important in the system design of the hard disk drive (HDD). As for the write head, it is a serious problem that the write track width varies significantly in the manufacturing processes. In the simulations, we evaluated the OTC of the wite/read head as a function of the write track width on both conventional and discrete track media from the viewpoint of the signal-to-noise ratio (SNR). As a result, we found that the OTC of write/read head on discrete track media was superior to that of conventional media for variations of the write track width.
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