Permittivity and permeability of Fe(Tb) nanoparticles and their microwave absorption in the 2–18 GHz range

Authors

Z. Han, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
D. Li, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
M. Tong, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
X. Wei, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
Ralph Skomski, University of Nebraska-LincolnFollow
W. Liu, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
Z. D. Zhang, Shenyang National Laboratory for Materials Science, Institute of Metal Research and International Center for Materials Physics, Chinese Academy of Sciences
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2010

Comments

Published in JOURNAL OF APPLIED PHYSICS 107, 09A929 (2010). Copyright © 2010 American Institute of Physics. Used by permission.

Abstract

The permittivity and permeability of the Tb-doped and undoped Fe core-shell nanoparticles were investigated for frequencies from 2 to 18 GHz. The particles were synthesized by arc discharge and contain some oxygen, probably in the form of Fe₂O₃, Fe₃O₄, and Tb₂O₃, whereas the core material is Fe. Both the electromagnetic materials constants and the morphology of the Fe nanoparticles are changed by Tb addition, which gives rise to the shifts to higher frequencies and thinner thicknesses of the maximum microwave absorption in the Tb-doped Fe nanoparticles.