Angle-resolved low-energy ion scattering studies of quasicrystalline Al-Pd-Mn

Cynthia J. Jenks; Amy R. Ross; Thomas A. Lograsso; Josh A. Whaley; Robert Bastasz

doi:10.1016/S0039-6028(02)02276-8

Angle-resolved low-energy ion scattering studies of quasicrystalline Al-Pd-Mn

Cynthia J. Jenks, Amy R. Ross, Thomas A. Lograsso, Josh A. Whaley, Robert Bastasz

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

We present angle-resolved low-energy ion scattering data that provide information about the composition of the topmost surface layers and atomic arrangement for a clean, 5-fold surface of a single-grain of icosahedral Al-Pd-Mn. The results show that the surface of this material has 5-fold periodicity and has a surface composition with a higher Al content than the bulk material (Al-86, Pd-13, Mn-1 versus Al-71, Pd-20, Mn-9 atom%). A predominant neighbor atom distance of 7.6 ± 0.5 Å is calculated from the results, consistent with scanning probe measurements and bulk models of Al-Pd-Mn quasicrystals. We calculate a nearest neighbor distance of 3.0 ± 0.2 Å. We also find that a Pd-rich layer exists just below an Al-rich outer layer, in agreement with dynamical low-energy electron diffraction calculations.

Original language	English
Pages (from-to)	34-42
Number of pages	9
Journal	Surface Science
Volume	521
Issue number	1-2
DOIs	https://doi.org/10.1016/S0039-6028(02)02276-8
State	Published - Dec 10 2002
Externally published	Yes

Funding

The authors thank Dr. Patricia A. Thiel for helpful discussions. This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division, of the US Department of Energy under Contract no.W-405-Eng-82 and also by Contract no. DE-AC04-94AL85000.

Funders	Funder number
Materials Sciences Division
Office of Energy Research
U.S. Department of Energy	DE-AC04-94AL85000
Basic Energy Sciences

Keywords

Aluminum
Low energy ion scattering (LEIS)
Manganese
Palladium
Surface structure, morphology, roughness, and topography

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10.1016/S0039-6028(02)02276-8

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title = "Angle-resolved low-energy ion scattering studies of quasicrystalline Al-Pd-Mn",

abstract = "We present angle-resolved low-energy ion scattering data that provide information about the composition of the topmost surface layers and atomic arrangement for a clean, 5-fold surface of a single-grain of icosahedral Al-Pd-Mn. The results show that the surface of this material has 5-fold periodicity and has a surface composition with a higher Al content than the bulk material (Al-86, Pd-13, Mn-1 versus Al-71, Pd-20, Mn-9 atom%). A predominant neighbor atom distance of 7.6 ± 0.5 {\AA} is calculated from the results, consistent with scanning probe measurements and bulk models of Al-Pd-Mn quasicrystals. We calculate a nearest neighbor distance of 3.0 ± 0.2 {\AA}. We also find that a Pd-rich layer exists just below an Al-rich outer layer, in agreement with dynamical low-energy electron diffraction calculations.",

keywords = "Aluminum, Low energy ion scattering (LEIS), Manganese, Palladium, Surface structure, morphology, roughness, and topography",

author = "Jenks, {Cynthia J.} and Ross, {Amy R.} and Lograsso, {Thomas A.} and Whaley, {Josh A.} and Robert Bastasz",

year = "2002",

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doi = "10.1016/S0039-6028(02)02276-8",

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T1 - Angle-resolved low-energy ion scattering studies of quasicrystalline Al-Pd-Mn

AU - Jenks, Cynthia J.

AU - Ross, Amy R.

AU - Lograsso, Thomas A.

AU - Whaley, Josh A.

AU - Bastasz, Robert

PY - 2002/12/10

Y1 - 2002/12/10

N2 - We present angle-resolved low-energy ion scattering data that provide information about the composition of the topmost surface layers and atomic arrangement for a clean, 5-fold surface of a single-grain of icosahedral Al-Pd-Mn. The results show that the surface of this material has 5-fold periodicity and has a surface composition with a higher Al content than the bulk material (Al-86, Pd-13, Mn-1 versus Al-71, Pd-20, Mn-9 atom%). A predominant neighbor atom distance of 7.6 ± 0.5 Å is calculated from the results, consistent with scanning probe measurements and bulk models of Al-Pd-Mn quasicrystals. We calculate a nearest neighbor distance of 3.0 ± 0.2 Å. We also find that a Pd-rich layer exists just below an Al-rich outer layer, in agreement with dynamical low-energy electron diffraction calculations.

AB - We present angle-resolved low-energy ion scattering data that provide information about the composition of the topmost surface layers and atomic arrangement for a clean, 5-fold surface of a single-grain of icosahedral Al-Pd-Mn. The results show that the surface of this material has 5-fold periodicity and has a surface composition with a higher Al content than the bulk material (Al-86, Pd-13, Mn-1 versus Al-71, Pd-20, Mn-9 atom%). A predominant neighbor atom distance of 7.6 ± 0.5 Å is calculated from the results, consistent with scanning probe measurements and bulk models of Al-Pd-Mn quasicrystals. We calculate a nearest neighbor distance of 3.0 ± 0.2 Å. We also find that a Pd-rich layer exists just below an Al-rich outer layer, in agreement with dynamical low-energy electron diffraction calculations.

KW - Aluminum

KW - Low energy ion scattering (LEIS)

KW - Manganese

KW - Palladium

KW - Surface structure, morphology, roughness, and topography

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DO - 10.1016/S0039-6028(02)02276-8

M3 - Article

AN - SCOPUS:0037058864

SN - 0039-6028

VL - 521

SP - 34

EP - 42

JO - Surface Science

JF - Surface Science

IS - 1-2

ER -

Angle-resolved low-energy ion scattering studies of quasicrystalline Al-Pd-Mn

Abstract

Funding

Keywords

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