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https://ah.lib.nccu.edu.tw/handle/140.119/70500
題名: | 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 |
貢獻者: | 應物所 | 日期: | 2010 | 上傳時間: | 9-十月-2014 | 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 | 資料類型: | article |
Appears in Collections: | 期刊論文 |
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