| Autor: |
Sangki Jeong, Michael E. McHenry, David E. Laughlin |
| Rok vydání: |
2001 |
| Předmět: |
|
| Zdroj: |
IEEE Transactions on Magnetics. 37:1309-1311 |
| ISSN: |
0018-9464 |
| DOI: |
10.1109/20.950826 |
| Popis: |
Thin [001] textured FePt and CoPt polycrystalline films (5 nm) were deposited with an MgO polycrystalline underlayer on an oxidized Si substrate followed by a Rapid Thermal Annealing (RTA) process. Structural analysis indicated the samples to be fully ordered after 10 minutes (min) of RTA at 700/spl deg/C. The magnetic hysteresis exhibited strong perpendicular anisotropy and a coercivity (H/sub c/) between 6 and 8 kOe. The measured and simulated angular dependence of H/sub c/ and remanent coercivity (H/sub re/) showed the possibility of domain wall motion or incoherent rotation. /spl delta/M curves demonstrated strong intergranular exchange coupling. MFM observations showed domain sizes to be 100-200 nm. Activation volumes (V/sub act/) were found to be /spl sim/0.4-0.5/spl times/10/sup -18/ cm/sup 3/. The temperature dependence of the coercivity (H/sub c/) indicated a weak pinning mechanism. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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