Atomic structure and magnetic moments in cluster-assembled nanocomposite Fe/Cu films

被引：21
作者：
Baker, S. H. [1 ]
Asaduzzaman, A. M. [1 ]
Roy, M. [1 ]
Gurman, S. J. [1 ]
Binns, C. [1 ]
Blackman, J. A. [1 ,2 ]
Xie, Y. [2 ]
机构：
[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England
[2] Univ Reading, Dept Phys, Reading RG6 6AF, Berks, England
来源：
PHYSICAL REVIEW B | 2008年 / 78卷 / 01期
关键词：
D O I：
10.1103/PhysRevB.78.014422
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The atomic structure and net magnetic moments in nanosized Fe clusters embedded in Cu were determined as a function of cluster filling fraction by extended x-ray-absorption fine structure (EXAFS) and magnetometry measurements, respectively. Below the percolation threshold (similar to 25%), the Fe clusters have an fcc structure with a lattice parameter of 3.58 +/- 0.02 angstrom and are ferromagnetic with a net atomic magnetic moment of 0.4-0.9 mu(B). Spin polarized electronic structure calculations were also performed on Fe core/Cu shell systems to investigate the magnetic behavior as a function of lattice spacing; the calculated moments correlate well with experiment.
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页数：10
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