Transition jitter and shape have been studied for soft exchange coupled composite (ECC) media and conventional perpendicular media using micromagnetic simulation. A realistic medium having nonuniform grain size has been employed. Media anisotropies are optimized to reduce the high density jitter for ECC and conventional media. Surprisingly, jitter is slightly decreased at high temperature for both media types. Eye diagrams show that short bit length amplitude is higher for ECC by approximately 10% at room temperature. This indicates that sharper transitions were obtained for ECC media particularly at 300 K where the thermal stability of ECC media presumably aids the write process.
|Original language||English (US)|
|Number of pages||4|
|Journal||IEEE Transactions on Magnetics|
|State||Published - Oct 2011|
Bibliographical noteFunding Information:
The authors thank Bogdan Valcu for numerous valuable discussions. The authors appreciate financial support from Seagate Technology and computing time from the Minnesota Supercomputing Institute.
- Exchange coupled composite (ECC) media
- micromagnetic simulation
- thermal fluctuation
- transition jitter