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Direct Synthesis of Isolated L10 FePt Nanoparticles in a Robust TiO2 Matrix via a Combined Sol–Gel/Pyrolysis Route


  • Financial support from the 2005-SGR-00401, MAT-2004-01679, and BIO-2003-06087 research projects and from the Russian Foundation for Basic Research (Grant Nos. 04-03-32634, 04-03-97233) and the Brazilian MCT/CNPq is acknowledged. We are grateful to O. Castells and the Servei de Microscopia of the Universitat Autònoma de Barcelona for their technical assistance in the TEM observations, Dr. G. Salazar for critical reading of the manuscript, and ICMAB for the use of their SQUID magnetometer. D. Muraviev acknowledges financial support from the Spanish MEC through a Ramon y Cajal contract.


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Tetragonal L10 FePt nanoparticles embedded in a robust TiO2 (rutile) matrix (see Figure) are obtained using a modified sol–gel synthesis method followed by metal reduction in a self-generated atmosphere during pyrolysis. The formation of metal nanoparticles is believed to proceed through the clustering of metal atoms inside the rigid and thermoresistant TiO2 network, which both prevents their aggregation and permits them to convert into the desired L10 face-centered tetragonal phase.

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