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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/46911

    Title: 以同步輻射光譜研究含過渡金屬之磁性惠斯勒化合物
    Other Titles: Synchrotron Radiation Spectroscopy Study of Transition Metal Based Magnetic Heusler Compounds
    Authors: 張經霖
    Contributors: 淡江大學物理學系
    Date: 2009
    Issue Date: 2010-04-15 15:33:55 (UTC+8)
    Abstract: 本計畫擬使用同步輻射光譜從微觀的角度對鐵、鈷和鎳系磁性惠斯勒相關材料的各項物理特性之起源與關聯作深入的探討。主要的實驗工作為x-光吸收光譜(XAS),包刮延深精x-光吸收細結構(EXAFS)和x-光吸收磁圓二色(XMCD)性以及x-光放射光譜(XES)等。藉由這些光譜所獲得的電子結構、原子結構和特定原子的磁矩分布狀況等資訊將可對鎳系的Ni2MnGa麻田散體相變(martensitic transformation)和鐵磁性與鎳/錳比例的關聯性、鐵系的Fe2VAl熱電和傳輸性質的鍺與矽之摻雜效應、以及鈷系Co2CrAl系列半金屬材料的電磁特性進行深入的瞭解。 We propose to microscopically study the rich physical properties of Fe-, Co- and Ni-based Heusler alloys using synchrotron radiation spectroscopy techniques. Major experimental works are x-ray absorption (XAS), which includes extended x-ray absorption fine structure (EXAFS) and x-ray magnetic circular dichroism (XMCD), and x-ray emission spectroscopy (XES). Information, provided by the spectroscopic, measurements including electronic and atomic structures and the magnetic moment distribution of specific atom will be utilized for the analysis of the following subjects. The effect of Ni/Mn ratio on the martensitic and ferromagnetic transformation of a series of Ni2+xMnxGa alloys, effect of Si and Ge doping on the thermoelectric and transport properties of Fe2VAl based materials and the electric and magnetic properties of Co2CrAl based half-metallic materials.
    Appears in Collections:[物理學系暨研究所] 研究報告

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