FePt patterned media were fabricated with varying pattern size, employing a deposition-last process and a CrV seed layer. The FePt patterns of sizes down to 30 nm showed a well-developed FCT structure characteristic of L10 phase. Due to the chemical and structural ordering, even 30 nm-sized FePt patterns exhibited a high ratio (3.4) of out-of-plane coercivity to in-plane coercivity and almost the same remanent magnetization as the saturation magnetization, indicating that a high perpendicular anisotropy is retained in the tiny patterns. The array of 30 nm patterns corresponds to a bit density of 1.8 Tbit/in2, demonstrating that terabit-density magnetic storage can be fabricated using the deposition-last process.
Bibliographical noteFunding Information:
This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2010-50193 ), a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, and the Pioneer Research Center Program ( 2010-0019313 ) through the National Research Foundation of Korea.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Physics and Astronomy(all)