Influence of Ni buffer layer on spin-related electronic properties of Co film on W(110) studied by spin-polarized single- and two-electron spectroscopy

被引：10
|
作者：
Samarin, S. [1 ]
Artamonov, O. M. [2 ]
Petrov, V. N. [1 ,3 ]
Kostylev, M. [1 ]
Pravica, L. [1 ]
Baraban, A. [2 ]
Williams, J. F. [1 ]
机构：
[1] Univ Western Australia, Ctr Atom Mol & Surface Phys, Perth, WA 6009, Australia
[2] St Petersburg State Univ, Res Inst Phys, St Petersburg 199034, Russia
[3] St Petersburg State Polytech Univ, St Petersburg, Russia
来源：
PHYSICAL REVIEW B | 2011年 / 84卷 / 18期
基金：
澳大利亚研究理事会;
关键词：
STONER EXCITATION SPECTRUM; ENERGY-LOSS SPECTROSCOPY; ULTRATHIN NI(111) FILMS; COBALT FILMS; SURFACES; MAGNETIZATION; PHOTOEMISSION; FERROMAGNETS; TEMPERATURE; SCATTERING;
D O I：
10.1103/PhysRevB.84.184433
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A thin Ni buffer layer between a W(110) substrate and a Co three-monolayer (ML) film was found to improve the crystallinity of the Co film and enhance its magnetic properties. The use of spin-polarized single-and two-electron spectroscopies allowed the identification of energy-and momentum-resolved spin-related modifications of the electronic structure of 3-ML cobalt film due to an Ni buffer layer on W(110) substrate. The presence of a thin Ni layer (1 to 4 MLs) increased the spin asymmetry of the Co density of states in the center of the Brillouin zone just below the Fermi level. Analysis of the spin asymmetry in the (e,2e) spectrum of Co film showed the spin-orbit component of asymmetry was readily observable even with 2 and 3 MLs of Ni buffer layers. The shape and magnitude of the asymmetry are similar to those observed in a 3-ML Co film on W(110) without an Ni buffer. This rules out the earlier suggestion that the spin-orbit interaction in the Co film is induced by W(110) substrate via the proximity effect.
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页数：7
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