Positron annihilation study of the Mg-Zn -Y alloys with long period stacking ordered (LPSO) structures

H. X. Xu, K. Inoue, Y. Nagai, T. Toyama, Y. Matsukawa, A. Kuramoto, D. Egusa, E. Abe, B. J. Ye

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

The Mg-Zn-Y alloys with long period stacking ordered (LPSO) structures have been studied by positron annihilation lifetime (PAL), coincidence Doppler broadening (CDB) and atom probe tomography (APT). The positron lifetime for all the Mg-Zn-Y alloys is in a range of 221∼225 ps, very close to the positron lifetime for pure Mg bulk, 222 ps. Low temperature measurements of the positron lifetime also give no evidence for shallow positron trapping sites in the LPSO phases. The CDB shows that most of the positrons are annihilated with electrons of Mg. These results suggest that sub-nano scale open volumes, which were expected to exist in the Zn/Y enriched layers synchronized with stacking faults of the LPSO phases by the first principles calculations, are not present.

本文言語English
論文番号012029
ジャーナルJournal of Physics: Conference Series
443
1
DOI
出版ステータスPublished - 2013
イベント16th International Conference on Positron Annihilation, ICPA 2012 - Bristol, United Kingdom
継続期間: 2012 8 192012 8 24

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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