کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1625395 | 1516428 | 2008 | 5 صفحه PDF | دانلود رایگان |
Flake-like nanocrystalline Fe3Co2 powders synthesized by mechanical alloying have been studied by morphological, structural and magnetic measurements, and compared with sphere-like samples. Complex permeability (μr=μ′r−iμ″rμr=μ′r−iμ″r) and permittivity (εr=ε′r−iε″rεr=ε′r−iε″r) was measured in microwave range of frequency (2–18 GHz). Combined with the nature of nanostructure and the dynamics of magnetism, the particle morphology and crystal structure dependence of microwave properties for nanocrystalline particles were studied. By virtue of fine particle size, ultrathin thickness (∼0.3 μm) and nano-sized structure, the flake-like Fe3Co2 particles increased the value of microwave permeability. Simultaneously, multiresonances emerged from the behind of eddy current loss, and were attributed to the surface anisotropy of nanograins.
Journal: Journal of Alloys and Compounds - Volume 448, Issues 1–2, 10 January 2008, Pages 303–307