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Preparation and dynamic magnetic properties of magnetic metal nanostructures research

Author: ChenWenBing
Tutor: HanManGui
School: University of Electronic Science and Technology
Course: Materials Science and Engineering
Keywords: Magnetic nanomaterials Micromagnetic Magnetic spectrum Microwave absorbent
CLC: TB383.1
Type: Master's thesis
Year: 2010
Downloads: 96
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Abstract


Magnetic metal nanomaterials have many unique properties , as well as in many areas of application prospects , magnetic metal nanomaterials become a research focus in recent years . From micromagnetic simulations and experiments on a variety of metallic nanostructures such as nanowires , nanotubes and nanodots dynamic magnetic do the research . In this paper, first from the point of view of the OOMMF Micromagnetic simulation , the single nanowires , nanotubes and nanodots dynamic magnetic susceptibility . Simulation results show that the the dynamic magnetic spectra of these nanostructures varies with various parameters , such as diameter , length , saturation magnetization, magnetic anisotropy constant change . In addition , studies have shown that the nanowire arrays and nano lattice dynamic magnetic spectrum magnetostatic coupling can not be neglected . On this basis , we nanowires various combinations and simulate its magnetic spectrum . Alumina templates prepared a variety of magnetic nanowires using electrochemical methods including the Co nanowires Ni nanowires , Ni / Co multilayer nanowires and CoNiCu Alloy Nanoparticles , morphology , crystal structure and static magnetic properties dynamic electromagnetic characterization and performance . In general, the hysteresis loop of the prepared various magnetic nanowires are shown in a weak anisotropy . The results also show that the magnetic nanowires can be used as a light weight , to absorb strong high-frequency microwave absorbing material , may be used in the GHz band . Then, we use the electrochemical deposition prepared magnetic the NiP nanotubes using electrochemical deposition prepared CoNiCu / Cu multilayer nanotubes in alumina template and polycarbonate template . Compared to magnetic nanotubes and nanowires have a lot of different characteristics , such as microwave absorbing properties of multimodal and broad-band absorption characteristics .

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CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
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