The feasibility of bit-patterned recording at 4 Tb/in.2 without heat-assist

Magnetic recording on bit patterned media with dot densities of 4 Tbit/in.(2) was simulated. Head field distributions of shielded, single pole write heads with various main pole widths were used for recording. Write windows, showing the range of head positions which resulted in error-free recording and no adjacent track erasure, were calculated. The bit aspect ratio (BAR) and magnetic spacing between the write head and the medium were varied and the system with the lowest write error rate was found to be a 1:1 BAR, shingled recording system. For single-track recording a 2:1 BAR and a magnetic spacing of 3.5 nm gave the lowest write-error rate. (C) 2011 American Institute of Physics. [doi:10.1063/1.3536666]