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High-Density Bit Patterned Media: Magnetic Design and Recording Performance

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5 Author(s)
Michael K. Grobis ; San Jose Research Center,, $^{1}$Hitachi Global Storage Technologies,, San Jose,, CA, USA ; Olav Hellwig ; Thomas Hauet ; Elizabeth Dobisz
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We examine the magnetic properties and recording performance of bit patterned exchange coupled composite (ECC) magnetic media at different bit and island aspect ratios. The ECC media consists of Co/Pd and Co/Ni multilayers whose coupling is controlled using Pd interlayers. We show that this multilayer system can be tuned to provide writeable media with a low switching field distribution for bit patterned magnetic recording. The recording performance of 100 Gb/in2 media shows a sub 1e-4 bit error rate floor and misregistration errors that are well-described by a simple error model.

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IEEE Transactions on Magnetics  (Volume:47 ,  Issue: 1 )