Electronic and crystalline structure of epitaxial EuNix films grown on Ni(111) -: art. no. 075415

被引:4
作者
Wieling, S [1 ]
Molodtsov, SL
Laubschat, C
Behr, G
机构
[1] Tech Univ Dresden, Inst Oberflachenphys & Mikrostrukturphys, D-01062 Dresden, Germany
[2] Inst Festkorperphys & Werkstofforsch, D-01171 Dresden, Germany
关键词
D O I
10.1103/PhysRevB.65.075415
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report on an angle-resolved and resonant photoemission study of ordered EuNix films grown on Ni(111). Eu is found to be trivalent in the bulk. but divalent at the surface. The low-energy electron-diffraction pattern reveals a (root3 x root3)R30degrees overstructure with respect to Ni(111). Formation of a Ni-rich compound with a stoichiometry close to EuNi5 is concluded. At the surface the stoichiometry is modified due to lattice expansion caused by the surface valence transition of the Eu ions.
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页码:1 / 6
页数:6
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