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    題名: Electronic and magnetic properties of CeAl2 nanoparticles
    作者: Dong, C. L.;Chen, Y. Y.;Chen, C. L.;Guo, J. H.;張經霖;Chang, C. L.
    貢獻者: 淡江大學物理學系
    關鍵詞: X-ray absorption;X-ray magnetic circular dichroism;Nanoparticles
    日期: 2006-09
    上傳時間: 2009-12-31 10:27:55 (UTC+8)
    出版者: Elsevier
    摘要: We presented the X-ray magnetic circular dichroism (XMCD) and X-ray absorption spectroscopy (XAS) studies of heavy fermion compound CeAl2 bulk and 8 nm nanoparticles, performed at the Ce M4,5- and L3- absorption edges. XMCD and XAS revealed that Ce in bulk CeAl2 exhibits localized 4f1 character with magnetic ordering. The Ce in nanoparticles, on the other hand, shows a small amount delocalized 4f0 character with non-magnetic Kondo behavior. By applying general sum rules, an estimation of the orbital and spin contribution to those Ce 4f moments can be obtained. Our results also demonstrated that the magnetic behavior in CeAl2 is very sensitive to the degree of localization of the 4f electrons.
    關聯: Journal of Magnetism and Magnetic Materials 304(1), pp.e22-e24
    DOI: 10.1016/j.jmmm.2006.02.029
    顯示於類別:[物理學系暨研究所] 期刊論文

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