Effect of induced uniaxial magnetic anisotropy on ferromagnetic resonance frequency of Fe-Co alloy nanoparticle/polystyrene nanocomposite

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• 作者：Hiroaki Kura ; Kotaro Hata ; Tadaaki Oikawa ; Migaku Takahashi ; Tomoyuki Ogawa
• 关键词：Ferromagnetic resonance ; Induced uniaxial magnetic anisotropy ; Nanocomposite ; Fe&ndash ; Co nanoparticle
• 刊名：Scripta Materialia
• 出版年：April, 2014
• 年：2014
• 卷：76
• 期：Complete
• 页码：65-68
• 全文大小：824 K

文摘

An Fe-Co nanoparticle assembly with uniaxial nanostructure was successfully obtained as a nanocomposite with polystyrene, which was polymerized in a magnetic field, H_fix (50 kOe), from a mixture of the Fe-Co nanoparticles and styrene monomer. The easy axis of magnetization was parallel to H_fix and the uniaxial magnetic anisotropy field of the nanocomposite was estimated to be 2.5 kOe. The ferromagnetic resonance frequency of the nanocomposite reached 6.8 GHz, which was larger than that of the nanocomposite prepared without H_fix.