Shingled Magnetic Recording on Bit Patterned Media at 10 Tb/in²

In this work, we have combined shingled magnetic recording and bit patterned media (BPM) to achieve an areal density of 10Tb/in². In our design, the gradient of the write field along the cross track direction is as high as 700 Oe/nm. Composite BPM are utilized and the ratio of thermal stability to switching field is optimized accordingly. Assuming 5% switching field distribution, 5% timing error, 5% jitter error and 5% track misregistration, the write field is 7.8 kOe and the BER is8.0× 10⁻⁴for 10Tb/in²with 5.4 nm×5.4 nm dots; the write field is 7.9 kOe and the BER is1.0× 10⁻³for 9.6Tb/in²with 4.4 nm×4.4 nm dots.