Title :
GHz range absorption properties of (α-Fe/Y2O3, FeCo/Y2O3 and α-Fe/Fe3B/Y2O3 nanocomposites
Author :
Machida, Ken-Ichi ; Liu, Jiu Rong ; Itoh, Masahira
Author_Institution :
Center for Adv. Sci. & Innovation, Osaka Univ., Japan
Abstract :
The growing popularity of electromagnetic wave (EMW) communication devices that use the 1-6 GHZ range has led to the need for EMW absorbing materials such as anti-electromagnetic interference coatings, self-concealing technology and microwave darkrooms. Magnetic materials of metals have large saturation magnetization and their Snoek´s limit is at a high frequency so that their complex permeability values remain high in such high frequency range. Hence, it is possible to make thin absorbers from these kinds of materials. The purpose of this study was to investigate the EM wave absorption properties of α-Fe/Y2O3, FeCo/Y2O3 and α-Fe/Fe3B/Y2O3 nanocomposites, because α-Fe, FeCo and Fe3B have fruitful anisotropy field values.
Keywords :
boron alloys; cobalt alloys; electromagnetic wave absorption; iron; iron alloys; magnetic anisotropy; nanocomposites; yttrium compounds; 1 to 6 GHz; EM interference; EMW absorption; Fe-Fe3B-Y2O3; Fe-Y2O3; FeCo-Y2O3; absorption properties; anisotropy field values; electromagnetic wave communication devices; ferromagnetic resonance theory; magnetic materials; magnetocrystalline anisotropy field; metallic magnets; nanocomposites; natural resonance frequency; saturation magnetization; Coatings; Electromagnetic interference; Electromagnetic scattering; Electromagnetic wave absorption; Frequency; Iron; Magnetic materials; Microwave communication; Microwave devices; Microwave technology;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1463981
