| Autor: |
Dieter Weller, George C. Hadjipanayis, M. Daniil, P.A. Farber, Hideyuki Okumura |
| Rok vydání: |
2002 |
| Předmět: |
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| Zdroj: |
Journal of Magnetism and Magnetic Materials. 246:297-302 |
| ISSN: |
0304-8853 |
| DOI: |
10.1016/s0304-8853(02)00097-5 |
| Popis: |
FePt particles with the high magnetocrystalline anisotropy L1 0 structure and particle sizes between 3 and 15 nm have been fabricated by annealing FePt/BN multilayers with bilayer thicknesses in the range of 2.5–200 A, at 600°C and 700°C. Films with thicker bilayer thicknesses were found to have a strong (1 1 1) texture, which is less developed in thinner bilayer films. For a particular bilayer thickness (FePt-20 A/BN-40 A), a special type of textured ordering is observed in the X-ray diffraction patterns, in which the c -axis of all the particles has a perpendicular component. Magnetic measurements showed that a wide range of coercivities (2–18 kOe) could be obtained in the films by varying the bilayer thickness and the annealing temperature and time. The concentration of BN was found to control the interparticle interactions, which for certain BN values led to decoupling of the FePt grains. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect