Exchange coupled composite (ECC) media exhibits a lower switching field than conventional perpendicular media at the same level of thermal stability, and thus is able to achieve higher areal density. The inhomogeneity of ECC media is predicted to enhance the thermal attempt frequency: this increases both writability and adjacent track erasure (ATE). The adverse change in ATE is, however, countered by the angular dependence of the ECC media switching field. This angular dependence is further exploited with a head design featuring a larger pole width than track width and the introduction of notches in the down track direction. This reduces the effect of head skew and increases the write field. An optimized head is found to be consistent with terabit/in2 recording.
|Original language||English (US)|
|Number of pages||6|
|Journal||IEEE Transactions on Magnetics|
|State||Published - Feb 2007|
Bibliographical noteFunding Information:
This work was supported by Seagate, the National Science Foundation under Grant ECS-0300209, and the INSIC EHDR program.
- Exchange coupled composite (ECC) media
- Pole head
- Thermal fluctuation