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A Millimeter‐Wave Absorber Based on Gallium‐Substituted ε‐Iron Oxide Nanomagnets
Author(s) -
Ohkoshi Shinichi,
Kuroki Shiro,
Sakurai Shunsuke,
Matsumoto Kazuyuki,
Sato Kimitaka,
Sasaki Shinya
Publication year - 2007
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200703010
Subject(s) - nanomagnet , gallium , extremely high frequency , millimeter , materials science , gallium oxide , oxide , nanotechnology , optoelectronics , metallurgy , optics , physics , magnetization , quantum mechanics , magnetic field
Restraining electromagnetic interference in the millimeter‐wave region has been accomplished with a new electromagnetic absorber composed of ε‐Ga x Fe 2− x O 3 (0.10≤ x ≤0.67) nanomagnets, which shows a ferromagnetic resonance in the range 35–147 GHz. The possibility that the ferromagnetic resonance can achieve a frequency of 190 GHz at x →0 is also suggested. See picture: H c =coercive field; f r =ferromagnetic resonance frequency.