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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/52944

    Title: Observations of Large Magnetic Moments in Icosahedral Pb Nanoparticles
    Authors: Karna,SK;Li,CY;Wu,CM;Hsu,CK;Wang,CW;Li,WH
    Contributors: 物理學系
    Date: 2011
    Issue Date: 2012-06-11 10:51:06 (UTC+8)
    Publisher: 國立中央大學
    Abstract: We report on the observation of a large magnetic moment in 7 nm icosahedral Pb particles. This moment is 140 times stronger than that developed in 6 nm fcc Pb particles. The saturation magnetization of 7 nm icosahedral Pb particles exhibits a peak at 40 K, which is reduced by only 9% when the temperature is increased from 40 to 300 K. No sign of the occurrence of superconductivity is observed in 7 nm icosahedral Pb particles upon cooling to 1.8 K, whereas superconductivity develops below 6.6 K in 6 nm fcc Pb particles. It is the icosahedral atomic arrangement that generates the large magnetic moment and suppresses the development of superconductivity in these nanoparticles.
    Appears in Collections:[物理學系] 期刊論文

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