(Color online) (a) The head writes two staggered tracks in a single pass in hexagonal array BPM with 8.1 nm dot size. Bit #2 is the currently written dot and bit #1 is the previously written dot. (b) The side profile of the head in the downtrack direction.
(Color online) Perpendicular field profiles along the staggered track and cross track directions.
(Color online) Perpendicular field gradient profiles along the down track and cross track directions.
(Color online) An example for a histogram for the distribution of the demagnetizing fields acting on an 8.1 nm × 8.1 nm bit.
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