1. Self-biased cobalt ferrite nanocomposites for microwave applications
- Author
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Sophie Neveu, Faouzi Kahlouche, Ardaches Tchangoulian, Didier Vincent, A. Hannour, Vincent Dupuis, Laboratoire Telecom Claude Chappe (LT2C), Université Jean Monnet [Saint-Étienne] (UJM)-Ecole d'ingenieurs Telecom Saint Etienne, Laboratoire Hubert Curien [Saint Etienne] (LHC), Institut d'Optique Graduate School (IOGS)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Liquides Ioniques et Interfaces Chargées (LI2C), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Université Jean Monnet - Saint-Étienne (UJM)-Ecole d'ingénieurs Télécom Saint-Etienne (TSE), Laboratoire Hubert Curien (LHC), and Institut d'Optique Graduate School (IOGS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Materials science ,Nanocomposite ,HFSS ,Circulator ,Nanoparticle ,Condensed Matter Physics ,7. Clean energy ,Ferromagnetic resonance ,Electronic, Optical and Magnetic Materials ,[SPI.TRON]Engineering Sciences [physics]/Electronics ,Magnetic anisotropy ,[SPI.ELEC]Engineering Sciences [physics]/Electromagnetism ,Nuclear magnetic resonance ,Remanence ,Composite material ,Microwave ,ComputingMilieux_MISCELLANEOUS - Abstract
Oriented CoFe2O4 nanoparticles, dispersed in polymethyl methacrylate (PMMA) matrix, were fabricated by magnetophoretic deposition of functionalized nanocolloidal cobalt ferrite particles into porous alumina membrane. Their magnetic behavior exhibits an out-of-plane easy axis with a large remanent magnetization and coercitivity. This orientation allows high effective internal magnetic anisotropy that contributes to the permanent bias along the wire axis. The microwave studies reveal a ferromagnetic resonance at 46.5 and 49.5 GHz, depending on the filling ratio of the membrane. Ansoft High Frequency Structure Simulator (Ansoft HFSS) simulations are in good agreement with experimental results. Such nanocomposite is presented as one of the promising candidates for microwave devices (circulators, isolators, noise suppressors etc.).
- Published
- 2014