FePt clusters synthesized by thermal pyrolysis of Fe and Pt compounds in an organic solvent

Authors

Yucheng Sui, University of Nebraska - LincolnFollow
Yao Zhao, University of Nebraska - LincolnFollow
Maria Daniil, University of Nebraska - LincolnFollow
Xingzhong Li, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

4-15-2006

Comments

Published by American Institute of Physics. J. Applied Physics 08G704 (2006). ©2006 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

A simple synthetic procedure involving the pyrolysis of Fe and Pt acetylacetonates mixed in trioctylamine results in the formation of alloy clusters with an average cluster around 4.2 nm and narrow size distribution. When the clusters are dispersed onto silicon wafers and heated under the protection of forming gas or nitrogen, the fcc structured clusters transform into hard magnetic FePt clusters with L1₀ chemical order. Coercivity values as high as 23 kOe are reached after rapid thermal annealing at 750 °C for 5 min.