The production of FePt and Fe 3O 4 by hydrogen reduction in nanotubes of porous alumina templates was investigated. Loading porous alumina with Fe chloride and Pt chloride mixture was followed by hydrogen reduction which led to the formation of ferromagnetic FePt nanotubes in the template. A tubular random-anisotropy model yielded a diameter and anisotropy dependent transition from a curling type mode to a localized mode. The results show that the magnetization reversal mode in the oxide tubes is of curling type whereas in the FePt tubes, reversal was realized by localized magnetization reversal.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)