LEED structure determination of two ordered surface alloys: Cu(100)-c(2 × 2)Mn and Ni(100)-c(2 × 2)Mn

Wuttig, Matthias; Knight, Colette C.; Flores, T.; Gauthier, Yves

doi:10.1016/0039-6028(93)90401-5

Cited by 86 publications

(40 citation statements)

References 12 publications

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“…In all calculations we used the local spin-density approximation in the parametrization of Volko, Wilk, and Nusair. 26 Four different configurations were investigated: the c(2 ϫ2) MnCu surface alloy with all atoms at ideal lattice positions and the c(2ϫ2) MnCu surface with the surface atoms at the positions determined by Wuttig et al 5 performing I/V LEED experiments. To simulate a single Mn impurity substituting a Cu atom we calculated the p(2ϫ2) MnCu surface alloy with one Mn atom per three Cu surface atoms.…”

Section: Computational Detailsmentioning

confidence: 99%

“…This system should allow the identification of effects due to the electronic structure of the system. To investigate the effect of the lattice relaxation on the STM image we used a second configuration with the Mn and the Cu atoms of the surface layer located according to the relaxation determined by Wuttig et al 5 Surprisingly, despite the huge relaxation of Mn, many results do not depend significantly on the amount of surface relaxation, as a direct comparison between the two systems reveals.…”

Section: A the C"2ã2… Mncuõcu"100… Surface Alloymentioning

confidence: 99%

“…The growth [1][2][3][4] and the structural, electronic, and magnetic properties of this system were investigated by quantitative I/V low-energy electron diffraction 5 ͑LEED͒, photoemission, 6,7 and inverse photoemission 6 ͑BIS͒, soft-x-ray absorption ͑SXA͒ and emission [8][9][10] ͑SXE͒, and magnetic circular dicroism 11 ͑CMXD͒. From this we can conclude that c(2ϫ2)MnCu/Cu(100) is structurally welldefined and stable over a large temperature range, with a large magnetic moment for Mn.…”

Section: Introductionmentioning

confidence: 99%

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Interpreting STM images of the MnCu/Cu(100) surface alloy

et al. 2000

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c(2ϫ2)MnCu/Cu (100) is an ordered two-dimensional surface alloy that exhibits a checkerboard arrangement of Mn and Cu atoms on the Cu͑100͒ surface. Mn buckles outwards by 0.3 Å with respect to Cu and in all previous scanning tunneling microscopy ͑STM͒ experiments only one chemical species was imaged which was assumed to be Mn. We analyze the STM results by first-principles calculations based on the densityfunctional theory and show that Cu rather than Mn is imaged, while indeed Mn is imaged as single Mn impurities at Cu͑100͒. We explain this result in terms of the formation of Mn states bridging over the Cu atoms. These Mn states are characteristic for Mn in a c(2ϫ2)MnCu surface alloy. Missing Mn atoms break this bridging bond and the surrounding Cu atoms are imaged as depressions.

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Section: Computational Detailsmentioning

confidence: 99%

Section: A the C"2ã2… Mncuõcu"100… Surface Alloymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interpreting STM images of the MnCu/Cu(100) surface alloy

et al. 2000

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“…It is shown that 0.5 ML Mn on a Ni(0 0 1) single crystal substrate forms a cð2 Â 2Þ reconstruction [13], a structure that has already been well studied using various methods such as LEED I-V and STM [13,14]. Because the surface morphology of Ni films grown on Cu(0 0 1) at room temperature does not have the compatible smoothness of Ni(0 0 1) single crystal, a sharp cð2 Â 2Þ LEED pattern of Mn/Ni/Cu(0 0 1) can only be obtained when Ni/Cu(0 0 1) is annealed at 450 K then cooled down to 400 K for the Mn deposition.…”

Section: Resultsmentioning

confidence: 99%

“…(1) A ferromagnetic coupling at the Mn/Ni interface of Mn/Ni/Cu(0 0 1) was reported by Schmitz et al using X-ray magnetic circular dichroism (XMCD) technique [12]. It would be interesting to apply the Surface magneto-optic Kerr effect (SMOKE) technique to this system; (2) According to the previous low-energy electron diffraction (LEED) I-V and STM results, the Mn atoms on the Ni film form a MnNi alloy layer [13,14]. It is then very interesting to study how the SRT of the Ni film would be modified by such a strong electronic perturbation at the Ni surface.…”

Section: Introductionmentioning

confidence: 86%

Effect of Mn overlayer on spin reorientation transition at Ni/Cu(001)

Tian

et al. 2005

Journal of Magnetism and Magnetic Materials

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Magnetism of Low‐dimensional Systems: Theory

Blügel

Bihlmayer

2007

Handbook of Magnetism and Advanced Magnetic Materials

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The article discusses the ground‐state properties of low‐dimensional magnets from the viewpoint of the electronic structure theory. The results presented arose from first‐principles calculations based on the material‐specific density‐functional theory. The focus lies on ultrathin films, wires, chains, and clusters with ferromagnetic, antiferromagnetic, and complex noncollinear magnetic phases. We discuss which systems become magnetic in low dimensions, their respective values for the spin and orbital magnetic moments, the magnetic ground‐state structures, and the magnetic anisotropy determining the orientation of the magnetization as well as how these properties are altered by respective substrates. The emphasis of the article lies in the development of the physical intuition by discussing the chemical trend of the properties of these magnets. Case studies of benchmark systems such as the magnetic surface alloy c(2 × 2)‐MnCu/Cu(100), Ni/Cu(100), which exhibits a magnetic reorientation transition, Fe/W(110), or Co chains on Pt(111) are discussed in more detail. A brief introduction to the basic concepts, notions, models, and theory is given, in order to provide a framework in which the surprising and partly peculiar results can be understood and interpreted. This includes the density‐functional theory, the Heisenberg model, the dipolar and magnetocrystalline anisotropy, the Dzyaloshinsky–Moriya interaction, the Stoner model, the role of the coordination number for the appearance of magnetism, and the estimation of the critical temperature.

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LEED structure determination of two ordered surface alloys: Cu(100)-c(2 × 2)Mn and Ni(100)-c(2 × 2)Mn

Cited by 86 publications

References 12 publications

Interpreting STM images of the MnCu/Cu(100) surface alloy

Interpreting STM images of the MnCu/Cu(100) surface alloy

Effect of Mn overlayer on spin reorientation transition at Ni/Cu(001)

Magnetism of Low‐dimensional Systems: Theory

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