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首页> 外文期刊>IEEE Transactions on Magnetics >DC erasure and demagnetizing fields on written bits in high density longitudinal media
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DC erasure and demagnetizing fields on written bits in high density longitudinal media

机译：高密度纵向介质中写入位的直流擦除和消磁场

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摘要

The DC erasure process in a CoCrTa medium used for 0.8 Gbit/in/sup 2/ recording is investigated and compared with a CoCrPtTa medium capable of supporting 5 Gbit/in/sup 2/. All-ones patterns up to 250 kfci were imaged in the remanent state after the application of in situ magnetic fields parallel to the tracks. For CoCrTa, the averaged MFM signal drops faster with field compared to the hulk DC demagnetization (DCD) curve, This is different from CoCrPtTa where the MFM signal fits the DCD curve for fields applied along the track direction. For both media, the normalized MFM signal reduction with field is independent of recording density indicating reduced average demagnetizing fields.
机译：研究了用于0.8 Gbit / in / sup 2 /记录的CoCrTa介质中的DC擦除过程，并将其与能够支持5 Gbit / in / sup 2 /的CoCrPtTa介质进行了比较。在施加平行于磁道的原位磁场后，高达250 kfci的全一模式在剩余状态下成像。对于CoCrTa，平均的MFM信号与场DC消磁（DCD）曲线相比，随场下降更快，这与CoCrPtTa不同，后者的MFM信号与沿磁道方向施加的场的DCD曲线拟合。对于两种介质，归一化的MFM信号随场的减小都与记录密度无关，这表明减小的平均退磁场。

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