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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/65271

    Title: 銅與氧化銅奈米顆粒複合系統自旋極化參數探討
    Authors: 陳廷瑋;Chen,Ting-wei
    Contributors: 物理學系
    Keywords: 自旋極化;;氧化銅;奈米顆粒;磁性;電子密度分布;電子分布;塞曼效應;久保能隙;spin polarization;copper;cupric oxide;copper(II) oxide;Cu;CuO;nanoparticle;magnetism;electron density map;Zeeman effect;Kubo gap
    Date: 2014-07-18
    Issue Date: 2014-10-15 14:48:11 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文探討不同比例,銅與氧化銅奈米顆粒複合系統的磁性參數變化,與樣品的電子密度分布。我們使用熱蒸鍍冷凝法製備銅奈米顆粒,將同一樣品置於空氣中氧化不同天數,由GSAS精算軟體分析,發現銅的氧化物中,僅產生氧化銅。氧化銅重量百分比分別為41 % 與80 %。
    ;In this thesis, we will discuss the magnetism parameters and electron density maps of different proportions Cu/CuO composite system. We were fabricated the copper nanoparticles by thermal evaporation method. To oxidize the sample, we put it in the air during different days. The composition of Cu/CuO is analysis by refining the X-ray diffraction pattern using General Structural Analysis System (GSAS) program. The mass ratios of CuO of two samples are 41 % and 80 %.
    We did a series of magnetization vary with applied magnetic field experiment, for understand magnetism difference of these samples. From the M(Ha) curve, we find there have three magnetic components. There are come from spin polarization, antiferromagnetism and Zeeman effect induced. We describe the magnetism behavior by Langevin function, linear function and Brilliouin function respectively.
    From electron density maps, we find there is no obviously difference at copper phase. At CuO phase, we find the Cu-O bonding become weak when particle size reduced. This result may be imply that the superexchange interaction of small size CuO in the Cu-O-Cu bonding is weaker than big size.
    Appears in Collections:[物理研究所] 博碩士論文

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