Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/20942
Title: Full X-Ku band microwave absorption by Fe(Mn)/Mn7C3/C core/shell/shell structured nanocapsules
Authors: Liu, X
Or, SW 
Ho, SL 
Cheung, CC
Leung, CM
Zheng, H
Geng, D
Zhang, Z
Keywords: Carbon
Complex permeability
Complex permittivity
Electromagnetic wave absorption
Nanocapsules
Reflection loss
Issue Date: 2011
Publisher: Elsevier
Source: Journal of alloys and compounds, 2011, v. 509, no. 37, p. 9071-9075 How to cite?
Journal: Journal of alloys and compounds 
Abstract: New type of Fe(Mn)/Mn7C3/graphite nanocapsules was prepared by a modified arc discharge technique in ethanol vapor, with Fe(Mn) solid solution nanoparticles as the core, Mn7C3 as the inner shell, and graphite as the outer shell. The Cole-Cole semicircle approach was adopted to explain the ternary dielectric resonance, due to a cooperative consequence of the core/shell/shell interfaces and the dielectric Mn 7C3 and C shells. A remarkable increase in the anisotropy energy led to a shift in the natural resonance frequency to 6.6 GHz. Dielectric losses come from the ternary dielectric resonance while magnetic losses were from the magnetic natural resonance. An optimal reflection loss (RL) of -142.1 dB was observed at 12 GHz for 5.0 mm thickness layer. RL exceeding -10 dB was obtained at 6.6-18 GHz for 1.4 mm thickness, covering the whole X band (8-12 GHz), Ku band (12-18 GHz), and some of C band (6.6-8.0 GHz). RL exceeding -20 dB was found at 6-10.6 GHz for 2.2 mm thickness.
URI: http://hdl.handle.net/10397/20942
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2011.06.031
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

33
Last Week
0
Last month
0
Citations as of Sep 9, 2017

WEB OF SCIENCETM
Citations

32
Last Week
0
Last month
0
Citations as of Sep 15, 2017

Page view(s)

56
Last Week
1
Last month
Checked on Sep 18, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.