Magnetic nanotubes produced by hydrogen reduction

Authors

Yucheng Sui, University of Nebraska-LincolnFollow
Ralph Skomski, University of Nebraska-LincolnFollow
Kory D. Sorge, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

6-1-2004

Comments

Published by American Institute of Physics. J. Applied Physics 95, 7151-7153 (2004). ©2004 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

FePt and Fe₃O₄ nanotubes are produced by hydrogen reduction in nanochannels of porous alumina templates and investigated by electron microscopy, x-ray diffraction, and superconducting quantum interference device magnetometry. Loading the templates with an Fe chloride and Pt chloride mixture, followed by hydrogen reduction at 560 °C, leads to the formation of ferromagnetic FePt nanotubes in the alumina pores. An Fe nitrate solution, thermally decomposed at 250 °C and reduced in hydrogen for 2.5 h at the same temperature, yields Fe₃O₄ tubes. The versatility of the method indicates that materials with a wide range of parameters can be produced.