Preparation of Sm-Ru bimetallic alloy films on Ru(0001) surface by vapour-deposition and annealing
G. Ranga Rao,Hisakazu Nozoye +1 more
TLDR
In this paper, XPS measurements on surface alloy film revealed an induced peak in the Ru 3dregion at lower binding energy by 1 eV compared to the bulk Ru (elemental) suggesting an electronic effect of alloying and rare earth Sm-Ru bond formation.Abstract:
Sm-Ru intermetallic surface alloy films were prepared by vacuum deposition and annealing of rare earth Sm on single crystal Ru(0001) surface. The Ru 3dand Sm 3dcore level spectra clearly show the formation of surface alloy layers. XPS measurements on surface alloy film revealed an induced peak in the Ru 3dregion at lower binding energy by 1 eV compared to the bulk Ru (elemental) suggesting an electronic effect of alloying and Sm-Ru bond formation. The Sm 3d5/2photoemission peak of Sm film consists of strong features characteristic of Sm(II) with electron configuration 4f6(5d6s)2and Sm(III) with electron configuration 4f5(5d6s)3.It is observed that the Sm(II) feature decreases in intensity upon alloy formation with surface Ru atoms. Oxidation of these films with carbon monoxide indicates alloy breakdown due to the oxidation of Sm atoms selectively. Alloy oxidation also shows a clear shift of Sm 3d5/2feature.read more
Citations
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Monolayer bimetallic surfaces: Experimental and theoretical studies of trends in electronic and chemical properties
TL;DR: In this paper, a review of the electronic and chemical properties of monolayer bimetallic surfaces (MBSs) is presented, focusing on the general trends in the electronic properties of MBSs.
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XPS characterization of SmNbO4 and SmTaO4 precursors prepared by sol-gel method
TL;DR: In this article, structural properties of precursors were investigated by X-ray photoelectron spectroscopy (XPS), and core-level XPS studies of sol-gel SNO and STO were performed for the first time.
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Evidence for perimeter sites over SmOx-modified Rh(1 0 0) surface by CO chemisorption
TL;DR: In this paper, the effect of covering of SmOx blocks some sites on the surface and suppresses adsorption of the typical CO species with an uptake at about 500 K, while a novel desorption peak centered at 260 K emerges in the CO TDS.
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Exploring the role of samarium in the modification of rhodium catalysts through surface science approach
TL;DR: In this paper, the authors review the preparation and reaction properties of ordered SmRh surface alloys and SmO x /Rh(1/0/0) model catalyst which have been systematically investigated by low energy electron diffraction (LEED), Auger electron spectroscopy (AES), X-ray photoelectron spectroscope (XPS), high-resolution electron energy loss spectrography (HREELS), and temperature desorption spectrograms (TDS).
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Effects of Sm implantation on the structure and magnetic properties of polar ZnO films
TL;DR: In this article, the authors reported a large ferromagnetic effect obtained by implanting Sm ions in Zn-polar and Opolar ZnO films prepared by molecular beam epitaxy (MBE) on sapphire substrates.
References
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A. M. De Asha,R.M. Nix +1 more
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A.K. Santra,C. N. R. Rao +1 more
TL;DR: X-ray and UV photoemission along with Auger spectroscopic studies show the formation of surface alloys in the Pd/Ag and Cu/Au overlayers on polycrystalline substrates as discussed by the authors.