Direct observation of ferromagnetic spin polarization in gold nanoparticles

Direct observation of ferromagnetic spin polarization in gold nanoparticles
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DOI:
10.1103/physrevlett.93.116801
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发表时间:
2004-09-10
影响因子:
8.6
通讯作者:
Hori, H
Hori, H
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Yamamoto, Y;Miura, T;Hori, H

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我们首次使用 X 射线磁圆二色性 (XMCD) 直接观察平均直径为 1.9 nm 的金纳米颗粒的铁磁自旋极化。由于XMCD的元素选择性,仅探索金的磁化强度。 XMCD 估计的金原子磁化强度与传统磁力测定法获得的结果非常吻合。这证明了纳米金的固有自旋极化。
We report the first direct observation of ferromagnetic spin polarization of Au nanoparticles with a mean diameter of 1.9 nm using x-ray magnetic circular dichroism (XMCD). Owing to the element selectivity of XMCD, only the gold magnetization is explored. Magnetization of gold atoms as estimated by XMCD shows a good agreement with results obtained by conventional magnetometry. This evidences intrinsic spin polarization in nanosized gold.