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Two-Dimensional Magnetic Recording at 10

机译:10处的二维磁记录

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摘要

A shingled recording head design is proposed that makes use of a saturation magnetization gradient to focus flux into the corner of the writing pole. This design yields field gradients of 800 Oem and can write more than 2.5 Tbits/in2 of user data onto a 10 nm thick ECC recording layer with 6 nm Voronoi grains. Maximum user densities are predicted to be over 4.66 Tbits/in2 with 8 nm grains and 12 Tbits/in2 with 5 nm grains using a perfect read and write scheme at a 1:1 bit aspect ratio. For read back, three contact dual differential MR head designs that have two independent free layers with magnetization pointing oppositely are examined for the purpose of extending magnetoresistive technology. The differential head shows good cross track resolution that will be advantageous at the low bit aspect ratios likely for two-dimensional magnetic recording. Results show that an array of three dual differential heads can successfully resolve an 8 nm track surrounded by adjacent tracks that have pseudo random bit sequences written to them, even though each head is wider than the track.
机译:提出了一种带盖记录头设计,该设计利用饱和磁化梯度将磁通量聚焦到写入极的角落。这种设计产生800 Oe / nm的场梯度,并且可以将超过2.5 Tbits / in 2 的用户数据写入具有6 nm Voronoi晶粒的10 nm厚ECC记录层。使用完美的读写方案,在8nm的晶粒下,最大用户密度预计将超过4.66 Tbits / in 2 。 1:1位长宽比。为了回读,出于扩展磁阻技术的目的,研究了具有两个独立的,磁化方向相反的自由层的三触点双差分MR磁头设计。差动头显示出良好的交叉轨迹分辨率,这在二维磁记录可能的低位宽高比时将是有利的。结果表明,由三个双差分磁头组成的阵列可以成功解析由相邻磁道包围的8 nm磁道,即使每个磁头宽于磁道,该磁道也写入了伪随机位序列。

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