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THE STUDY OF SURFACE SEGREGATION, STRUCTURE, AND VALENCE BAND DENSITY OF STATES OF Pt₃Ni(100), (110), AND (111) CRYSTALS

B. S. MUN

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

Corresponding author.

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M. WATANABE

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

RIKEN/SPring-8, Kuoto 1-1-1 Mikazuki Sayo, Hyogo 679-5148, Japan

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M. ROSSI

Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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V. STAMENKOVIC

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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N. M. MARKOVIC

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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, and

P. N. ROSS, Jr.

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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https://doi.org/10.1142/S0218625X06008682Cited by:13 (Source: Crossref)

Abstract

The surface segregation, structure, and valence band density of states of Pt₃Ni(100), (110), and (111) single crystals are characterized with low energy ion scattering (LEIS), low energy electron diffraction (LEED), and ultraviolet photoemission spectroscopy (UPS). The results of LEIS clearly reveal the complete surface segregation of Pt to the top layer on all crystal alloys. LEED indicates the (5 × 1) surface reconstruction on the Pt₃Ni(100), while (110) and (111) surfaces show (2 × 1) and (1 × 1) patterns, respectively, identical to Pt single crystals. The valence bands density of states on Pt₃Ni alloys are compared to those of Pt single crystals via UPS measurements.

Keywords:

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