Charge redistribution in ion-beam-mixed Pd-Ag alloys

K. H. Chae; Y. S. Lee; C. N. Whang; Y. Jeon; B. S. Choi; M. Croft

doi:10.1016/0168-583X(96)00293-5

Charge redistribution in ion-beam-mixed Pd-Ag alloys

K. H. Chae, Y. S. Lee, C. N. Whang, Y. Jeon, B. S. Choi, M. Croft

School of Arts and Sciences, Physics & Astronomy

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

6 Scopus citations

Abstract

Charge flow and valence/d-band behavior in ion-beam-mixed (IBM) Pd₁-_xAg_x (x = 0.5-0.9) alloys have been studied by X-ray photoemission measurement of the valence bands and of core-level binding energy shifts and X-ray absorption near-edge structure. We correlated the observed Ag 3d_5/2 core-level shifts in these IBM alloys, relative to the elemental Ag, with the White Line area changes at the Pd and Ag L₃-edge to investigate the charge redistribution at the Ag site. The results indicate that there is a decrease in sp-like conduction electron and a negligible change in the number of d-electrons at the Ag site upon alloying. These results are in line with our previous results in which Pd gains d-charges and loses sp-type charges. This electron redistribution due to hybridization in the alloy leads small net charge transfer from the Ag site to the Pd site in accordance with electronegativity predictions. This result is consistent with the result of recent theoretical calculation of Lu et al. using the "special-quasi-random-structure" (SQS) concept in which Ag loses mainly sp-charge while Pd gains d-charge in forming the PdAg alloy.

Original language	English (US)
Pages (from-to)	123-128
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume	117
Issue number	1-2
DOIs	https://doi.org/10.1016/0168-583X(96)00293-5
State	Published - Aug 1996

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Instrumentation

Keywords

Charge transfer
Electronic structure
Ion-beam-mixing
Valence band
XANES
XPS

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10.1016/0168-583X(96)00293-5

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@article{d860d9aa0a6849c8ab6bf933ee3cea0f,

title = "Charge redistribution in ion-beam-mixed Pd-Ag alloys",

abstract = "Charge flow and valence/d-band behavior in ion-beam-mixed (IBM) Pd1-xAgx (x = 0.5-0.9) alloys have been studied by X-ray photoemission measurement of the valence bands and of core-level binding energy shifts and X-ray absorption near-edge structure. We correlated the observed Ag 3d5/2 core-level shifts in these IBM alloys, relative to the elemental Ag, with the White Line area changes at the Pd and Ag L3-edge to investigate the charge redistribution at the Ag site. The results indicate that there is a decrease in sp-like conduction electron and a negligible change in the number of d-electrons at the Ag site upon alloying. These results are in line with our previous results in which Pd gains d-charges and loses sp-type charges. This electron redistribution due to hybridization in the alloy leads small net charge transfer from the Ag site to the Pd site in accordance with electronegativity predictions. This result is consistent with the result of recent theoretical calculation of Lu et al. using the {"}special-quasi-random-structure{"} (SQS) concept in which Ag loses mainly sp-charge while Pd gains d-charge in forming the PdAg alloy.",

keywords = "Charge transfer, Electronic structure, Ion-beam-mixing, Valence band, XANES, XPS",

author = "Chae, {K. H.} and Lee, {Y. S.} and Whang, {C. N.} and Y. Jeon and Choi, {B. S.} and M. Croft",

note = "Funding Information: This work was supportedi n part by: the Basic Science Research Institute Program, Ministry of Education, 1995, Project No. BSRI-95-2433, BSRI-95-2426; the Korea Science and Engineering Foundation (KOSEF) through the Science Research Center (SRC) of Excellence Program; NON DIRECTED RESEARCH FUND, Korea Research Foundation;a grant from the Jeonju University.",

year = "1996",

month = aug,

doi = "10.1016/0168-583X(96)00293-5",

language = "English (US)",

volume = "117",

pages = "123--128",

journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",

issn = "0168-583X",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Charge redistribution in ion-beam-mixed Pd-Ag alloys

AU - Chae, K. H.

AU - Lee, Y. S.

AU - Whang, C. N.

AU - Jeon, Y.

AU - Choi, B. S.

AU - Croft, M.

N1 - Funding Information: This work was supportedi n part by: the Basic Science Research Institute Program, Ministry of Education, 1995, Project No. BSRI-95-2433, BSRI-95-2426; the Korea Science and Engineering Foundation (KOSEF) through the Science Research Center (SRC) of Excellence Program; NON DIRECTED RESEARCH FUND, Korea Research Foundation;a grant from the Jeonju University.

PY - 1996/8

Y1 - 1996/8

N2 - Charge flow and valence/d-band behavior in ion-beam-mixed (IBM) Pd1-xAgx (x = 0.5-0.9) alloys have been studied by X-ray photoemission measurement of the valence bands and of core-level binding energy shifts and X-ray absorption near-edge structure. We correlated the observed Ag 3d5/2 core-level shifts in these IBM alloys, relative to the elemental Ag, with the White Line area changes at the Pd and Ag L3-edge to investigate the charge redistribution at the Ag site. The results indicate that there is a decrease in sp-like conduction electron and a negligible change in the number of d-electrons at the Ag site upon alloying. These results are in line with our previous results in which Pd gains d-charges and loses sp-type charges. This electron redistribution due to hybridization in the alloy leads small net charge transfer from the Ag site to the Pd site in accordance with electronegativity predictions. This result is consistent with the result of recent theoretical calculation of Lu et al. using the "special-quasi-random-structure" (SQS) concept in which Ag loses mainly sp-charge while Pd gains d-charge in forming the PdAg alloy.

AB - Charge flow and valence/d-band behavior in ion-beam-mixed (IBM) Pd1-xAgx (x = 0.5-0.9) alloys have been studied by X-ray photoemission measurement of the valence bands and of core-level binding energy shifts and X-ray absorption near-edge structure. We correlated the observed Ag 3d5/2 core-level shifts in these IBM alloys, relative to the elemental Ag, with the White Line area changes at the Pd and Ag L3-edge to investigate the charge redistribution at the Ag site. The results indicate that there is a decrease in sp-like conduction electron and a negligible change in the number of d-electrons at the Ag site upon alloying. These results are in line with our previous results in which Pd gains d-charges and loses sp-type charges. This electron redistribution due to hybridization in the alloy leads small net charge transfer from the Ag site to the Pd site in accordance with electronegativity predictions. This result is consistent with the result of recent theoretical calculation of Lu et al. using the "special-quasi-random-structure" (SQS) concept in which Ag loses mainly sp-charge while Pd gains d-charge in forming the PdAg alloy.

KW - Charge transfer

KW - Electronic structure

KW - Ion-beam-mixing

KW - Valence band

KW - XANES

KW - XPS

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U2 - 10.1016/0168-583X(96)00293-5

DO - 10.1016/0168-583X(96)00293-5

M3 - Article

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SN - 0168-583X

VL - 117

SP - 123

EP - 128

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

IS - 1-2

ER -

Charge redistribution in ion-beam-mixed Pd-Ag alloys

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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