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    题名: Magnetoelectric behavior of carbonyl iron mixed Mn oxide-coated ferrite nanoparticles
    作者: 李尚凡
    Faris B. Abdul Ahad;Lee,Shang-Fan;Hung,Dung-Shing;Yao,Yeong-Der;Yang,Ruey-Bin;Lin,Chung-Kwei;Tsay,Chien-Yie
    贡献者: 應物所
    日期: 2010
    上传时间: 2014-10-09 15:49:47 (UTC+8)
    摘要: The dielectric and magnetic properties of manganese oxide-coated Fe3O4 nanoparticles (NPs) were measured by the cavity perturbation method at x-band microwave frequencies ranging from 7–12.5 GHz with controlled external magnetic field up to 2.2 kOe at room temperature. Different ratios (5%, 10%, and 20% by weight) of coated NPs were prepared by sol-gel method then mixed with carbonyl ironpowder in epoxy matrix. The saturation magnetization is inversely proportional to the NPs ratio in the mixture between 150 and 180 emu/g. The real part of the permittivity decreased with increasing NPs concentration, but the permittivity change by magnetic field increased. The tunability behavior is explained by insulator-ferromagnetic interface magnetoelectricity and the large surface volume ratio for the NPs.
    關聯: J. Appl. Phys,107, 09D904
    数据类型: article
    显示于类别:[應用物理研究所 ] 期刊論文

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