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首页> 外文期刊>IEEE Transactions on Magnetics >Analysis of Reader-Induced “Skew” Bias in Shingled Magnetic Recording
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Analysis of Reader-Induced “Skew” Bias in Shingled Magnetic Recording

机译：磁记录中读者引起的“歪斜”偏差分析

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摘要

Among key technologies that support areal density growth, shingled magnetic recording (SMR) can be applied with a conventional magnetic recording head and does not require significant head design or structure changes compared to heat-assisted magnetic recording and microwave-assisted magnetic recording. Shingled writing is also essential for 2-D magnetic recording. In the application of SMR with a conventional head which has a single reader and a symmetrical writer, one would expect equal performance between writing with the inner side and the outer side when the head is at 0° skew angle. However, it is found statistically, with a large quantity of samples, that there is a preference toward writing with either inner or outer side depending on whether the head is an up or down facing head in a drive. Two types of readers with opposite wafer level free layer (FL) and reference layer (RL) canting directions also show opposite preference for the data written by the same heads. Experiments performed suggest that the reader may induce some “skew” bias in SMR application on top of the writer contribution. A hypothesis combining reader FL direction and reader RL canting is proposed to explain the observed phenomena.
机译：在支持面密度增长的关键技术中，带盖磁记录（SMR）可以与常规磁记录头一起使用，与热辅助磁记录和微波辅助磁记录相比，不需要显着的磁头设计或结构更改。叠写对于2D磁记录也是必不可少的。在具有单个读取器和对称写入器的传统磁头的SMR应用中，人们期望当磁头处于0°倾斜角时，内侧和外侧的写入性能相同。但是，从统计上发现，对于大量的样本，根据驱动器中磁头是朝上还是朝下的磁头，倾向于向内侧或外侧进行写入。具有相反晶片水平自由层（FL）和参考层（RL）倾斜方向的两种类型的读取器也显示出对相同磁头写入数据的相反偏好。进行的实验表明，在作者的贡献之上，读者可能会在SMR应用程序中引起一些“偏斜”偏差。提出了结合阅读器FL方向和阅读器RL倾斜的假设来解释观察到的现象。

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