Surface Spin Polarization of Fe Nanoclusters
Surface Spin Polarization of Fe Nanoclusters
复制标题
Fe 纳米团簇的表面自旋极化
DOI:
10.1109/tmag.2010.2045482
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发表时间:
2010
影响因子:
2.1
通讯作者:
Pratt A
中科院分区:
文献类型:
--
作者:
Pratt A
The spin polarization at the surface of Fe nanoclusters has been probed using a spin-polarized metastable helium beam. The clusters, produced in a gas aggregation source, display a lognormal size distribution with a peak centered at ~11 nm. Varying coverages of both spheroid- and cuboid-shaped particles were concomitantly deposited onto clean Si(111) substrates for investigation with the extremely surface sensitive technique of metastable de-excitation spectroscopy (MDS). A nominal cluster coverage of 8 ¿ yielded a maximum asymmetry of ~10% in the ejected electron yield for He spins aligned parallel and anti-parallel to the magnetization direction of the clusters. When compared to values obtained from epitaxial Fe films on various substrates, the measured asymmetry suggests an enhancement in the surface spin polarization, as theoretically proposed. The atomic structure of the clusters and their topography on the Si(111) substrates were studied with transmission and scanning electron microscopy.
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影响因子:
--
作者:
C. Binns
通讯作者:
C. Binns
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
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通讯作者:
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DOI:
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2008
期刊:
Journal of Physics: Condensed Matter
影响因子:
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通讯作者:
G. Güntherodt
影响因子:
8.6
作者:
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通讯作者:
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DOI:
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发表时间:
2008
期刊:
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作者:
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通讯作者:
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