Electronic structures and impurity cluster features in Mg-Zn-Y alloys with a synchronized long-period stacking ordered phase

Shinya Hosokawa, Kenji Maruyama, Kentaro Kobayashi, Jens Rüdiger Stellhorn, Benedict Paulus, Akihide Koura, Fuyuki Shimojo, Takao Tsumuraya, Michiaki Yamasaki, Yoshihito Kawamura, Satoru Yoshioka, Hitoshi Sato

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Photoemission and inverse-photoemission spectroscopy (PES and IPES) measurements were carried out on polycrystalline Mg97Zn1Y2, Mg85Zn6Y9, and Mg75Zn10Y15 alloys with a synchronized long-period stacking ordered phase together with non-doped Mg to investigate the valence- and conduction-band electronic structures, respectively. It was found from the valence-band PES spectra that the non-doped Mg includes at most 25% of an intrinsic oxidation portion. With increasing impurity concentration, the valence-band density of states (DOS) very slightly changes, while the conduction-band DOS drastically varies. The contributions of the impurity elements are clarified using a density functional theory calculation for the Mg85Zn6Y9 alloy. The core-level PES measurements were also performed at the Mg 2s, 2p, Zn 3p, 3d, and Y 3d levels to study the chemical natures of the corresponding elements. The Y 3d core spectrum exhibits mostly three doublets in Mg97Zn1Y2, while mostly only one in the heavily doped alloys, reflecting a coexistence of three different sites of the Y atoms; ones in the Zn6Y8 L12 clusters, ones in their fragments, and isolated ones in Mg97Zn1Y2.

Original languageEnglish
Pages (from-to)797-805
Number of pages9
JournalJournal of Alloys and Compounds
Volume762
DOIs
Publication statusPublished - Sep 25 2018

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Valence bands
Electronic structure
Impurities
Conduction bands
Core levels
Photoemission
Photoelectron spectroscopy
Density functional theory
Atoms
Oxidation

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Electronic structures and impurity cluster features in Mg-Zn-Y alloys with a synchronized long-period stacking ordered phase. / Hosokawa, Shinya; Maruyama, Kenji; Kobayashi, Kentaro; Stellhorn, Jens Rüdiger; Paulus, Benedict; Koura, Akihide; Shimojo, Fuyuki; Tsumuraya, Takao; Yamasaki, Michiaki; Kawamura, Yoshihito; Yoshioka, Satoru; Sato, Hitoshi.

In: Journal of Alloys and Compounds, Vol. 762, 25.09.2018, p. 797-805.

Research output: Contribution to journalArticle

Hosokawa, S, Maruyama, K, Kobayashi, K, Stellhorn, JR, Paulus, B, Koura, A, Shimojo, F, Tsumuraya, T, Yamasaki, M, Kawamura, Y, Yoshioka, S & Sato, H 2018, 'Electronic structures and impurity cluster features in Mg-Zn-Y alloys with a synchronized long-period stacking ordered phase', Journal of Alloys and Compounds, vol. 762, pp. 797-805. https://doi.org/10.1016/j.jallcom.2018.05.163
Hosokawa, Shinya ; Maruyama, Kenji ; Kobayashi, Kentaro ; Stellhorn, Jens Rüdiger ; Paulus, Benedict ; Koura, Akihide ; Shimojo, Fuyuki ; Tsumuraya, Takao ; Yamasaki, Michiaki ; Kawamura, Yoshihito ; Yoshioka, Satoru ; Sato, Hitoshi. / Electronic structures and impurity cluster features in Mg-Zn-Y alloys with a synchronized long-period stacking ordered phase. In: Journal of Alloys and Compounds. 2018 ; Vol. 762. pp. 797-805.
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