Interface structures in FePt/Fe₃Pt hard-soft exchange-coupled magnetic nanocomposites

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2003-25-03_APL_1.pdf (542.44 KB)
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Wang, Z. L. (Zhong Lin)
Zeng, Hao
Sun, Shouheng
Liu, J. Ping
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http://hdl.handle.net/1853/27101
Abstract
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.
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2003-05-26
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