Electronic structure of nanosized bcc Cu precipitates in Fe-Cu alloys studied by positron 2D-ACAR

Toshinobu Chiba, Yasuyoshi Nagai, Zheng Tang, Takashi Akahane, Masayuki Hasegawa, Minoru Takenaka, Eiichi Kuramoto

研究成果: Conference contribution

3 被引用数 (Scopus)

抄録

Based on the finding with the use of the coincidence Doppler measurements that the nanosized Cu precipitates are coherently embedded in the Fe-Cu matrix alloy, taking a bcc structure and acting as efficient positron traps, we measured 2D-ACARs of carefully grown and heat treated single crystals of Fe-Cu. We found that the precipitates have a Fermi surface with 12 necks touching the {110} Bragg planes of the bcc Brillouin zone, which contrasts distinctly with that of the bulk Cu with 8 necks touching the {111} Bragg planes of the fee Brillouin zone. The 3 dimensional momentum reconstruction of the 2D ACAR data showed that the Fermi surface cutoff of the Cu precipitates is blurred considerably as compared with that of bulk fee Cu, suggesting a marked size effect in the momentum distribution.

本文言語English
ホスト出版物のタイトルPositron Annihilation
ホスト出版物のサブタイトルProceedings of the 13th International Conference on Positron Annihilation, ICPA-13
編集者Toshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
出版社Trans Tech Publications Ltd
ページ380-384
ページ数5
ISBN(印刷版)9780878499366
DOI
出版ステータスPublished - 2004
イベントPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan
継続期間: 2003 9 72003 9 12

出版物シリーズ

名前Materials Science Forum
445-446
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

OtherPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
CountryJapan
CityKyoto
Period03/9/703/9/12

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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