High-Coercivity FePt Nanoparticle Assemblies Embedded in Oxide-Matrix by Atomic Layer Deposition |
| J.-Z. Konga, b, A.-D. Lia, M.-Y. Gaoa, Q.-Y. Yanc and D. Wua
aMaterials Science and Engineering Department, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P.R. China bNanjing University Aeronaut & Astronaut, Academy Frontier Science, Nanjing 210016, P.R. China cSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 |
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| Self-assembled face-centered cubic FePt nanoparticles were embedded into the oxide capping layer using the atomic layer deposition technology. The effect of the oxide-matrix layer on the structure, mono-dispersibility, and magnetic properties of the FePt/oxide composite thin films was investigated. Experimental results suggest that the protection of the oxide-matrix capping layer can effectively inhibit the grain growth and particle aggregation, and preserve the ordered domains of the FePt nanoparticles during the L 10 ordering transition through annealing. The combination of the atomic layer deposition capping layer and self-assembled FePt nanoparticles provides a new potential approach to fabricate the ultrahigh-density magnetic recording media. |
DOI: 10.12693/APhysPolA.123.173 PACS numbers: 75.50.Vv, 75.75.Cd, 75.50.Bb, 75.50.Ss |