Interface structures in FePt/Fe[sub 3]Pt hard-soft exchange-coupled magnetic nanocomposites

✍ Scribed by Li, Jing; Wang, Zhong Lin; Zeng, Hao; Sun, Shouheng; Ping Liu, J.

• Book ID: 121685836
• Publisher: American Institute of Physics
• Year: 2003
• Tongue: English
• Weight: 713 KB
• Volume: 82
• Category: Article
• ISSN: 0003-6951
• DOI: 10.1063/1.1578515

✦ Synopsis

Self-assembly of FePt and Fe3O4 nanoparticles of different sizes led to various FePt–Fe3O4 nanocomposites. Annealing the composite under reducing atmosphere at 650 and 700 °C induced magnetically hard FePt phase and magnetically soft Fe3Pt phase. The FePt and Fe3Pt phases were either linked by a common interface or coexisted within one grain as domains with sizes <10 nm. This ensures the effective exchange coupling of magnetically hard and soft phases. High-resolution transmission electron microscopy studies provide detailed structural characterization for the FePt based nanocomposites.