Phys. Rev. B 56, 10585–10589 (1997)Surface structure analysis of Ni(111)-(√3×√3)R30°-Pb by impact-collision ion-scattering spectroscopyReceived 30 December 1996; revised 4 June 1997; published in the issue dated 15 October 1997 Impact-collision ion-scattering spectroscopy, low-energy electron diffraction, and Rutherford backscattering spectroscopy have been used to analyze the Ni{111}-(√3×√3)R30°-Pb structure. It was found that annealing Pb-covered Ni surfaces with an initial coverage of 0.45 ML gives rise to a stable Ni{111}-(√3×√3)R30°-Pb structure. The experimental data and computer simulations support a structural model for the Ni{111}-(√3×√3)R30°-Pb structure in which Pb atoms displace part of the first layer Ni atoms and incorporate them into the first Ni layer, with the Pb atoms displaced outward 0.2 Å with respect to the first-layer Ni atoms. However, 20–30% of Pb atoms are randomly missing from the ideal Ni{111}-(√3×√3)R30°-Pb model. This study shows surface alloying of immiscible metals in agreement with other recent studies. © 1997 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.56.10585
DOI:
10.1103/PhysRevB.56.10585
PACS:
68.55.Jk, 68.55.Nq, 61.18.Bn
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.