Influence of exchange bias field on off-track performance of spin-valve heads

摘要

The off-track performance of magnetic recordingheads is a key issue in achieving high track density. In this study,the position error signal (PES) and off-track capability (OTC)were calculated for spin-valve heads. The position error becamelarge when the direction of the exchange bias field deviated andwas disordered in the pinned layer. The OTC also as increased thedeviation angle of the disordered direction of the exchange biasfield decreased. Therefore, an angular deviation of less than 10degree is necessary to obtain reliable tracking.