Preparation of Sm�?�Ru bimetallic alloy films on Ru(0001) surface by vapour-deposition and annealing

Bulletin of materials science

G Ranga Rao²  H Nozoye¹ 

[1] National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305, Japan$$National Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305, JapanNational Institute of Materials and Chemical Research, 1-1 Higashi, Tsukuba, Ibaraki 305, Japan$$;Department of Chemistry, Indian Institute of Technology, Chennai 600 036, India$$Department of Chemistry, Indian Institute of Technology, Chennai 600 036, IndiaDepartment of Chemistry, Indian Institute of Technology, Chennai 600 036, India$$

关键词: Surface film;    XPS;    rare earth;    bimetallic alloy;    ruthenium.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Smâ€�?�Ru intermetallic surface alloy films were prepared by vacuum deposition and annealing of rare earth Sm on single crystal Ru(0001) surface. The Ru 3ð‘�?? and Sm 3ð‘�?? core level spectra clearly show the formation of surface alloy layers. XPS measurements on surface alloy film revealed an induced peak in the Ru3ð‘�?? region at lower binding energy by 1 eV compared to the bulk Ru (elemental) suggesting an electronic effect of alloying and Smâ€�?�Ru bond formation. The Sm 3ð‘�??_5/2 photoemission peak of Sm film consists of strong features characteristic of Sm(II) with electron configuration 4ð‘�??⁶ (5ð‘�?? 6ð‘�?)² and Sm(III) with electron configuration 4ð‘�??⁶ (5ð‘�?? 6ð‘�?)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 3ð‘�??_5/2 feature.

【 授权许可】

Unknown