STRUCTURE AND COMPOSITION OF PT10NI90(100) - A LOW-ENERGY ELECTRON-DIFFRACTION STUDY

被引：53

作者：

GAUTHIER, Y ^{[1
]}

HOFFMANN, W ^{[1
]}

WUTTIG, M ^{[1
]}

机构：

[1] FORSCHUNGSZENTRUM JULICH, INST GRENZFLACHENFORSCH & VAKUUMPHYS, W-5170 JULICH 1, GERMANY

来源：

SURFACE SCIENCE | 1990年 / 233卷 / 03期

关键词：

D O I：

10.1016/0039-6028(90)90635-L

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface segregation is measured at Pt10Ni90(100) by means of LEED, using the averaged-t Matrix Approximation. We find that the first layer is enriched with Pt (C1 = 24.3 ± 2.7 at% Pt) while the second is slightly depleted (C2 = 6.4 ± 5.9%). The i distances happen to be very weakly modified with respect to the bulk distance, but a clear oscillation is found: Δd12 = 2.0 ± 0.3%, Δd23 = -1.2 ± 0.4%, Δd34 = 1.6 ± 0.9%. Weak stripes which are observable at certain electron energies indicate that partial o might exist in the surface plane. The results are discussed in connection with results published on other faces of the same alloy. © 1990.

引用

页码：239 / 247

页数：9

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