Crystallographic site of Mn in the icosahedral cluster of LaCo13-xMnx compounds

K. Asada, K. Konno, M. Matsuura, M. Sakurai, A. Fujita, K. Fukamichi

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Studies on the structure and the crystallographic site of Mn in LaCo13-xMnx compounds were carried out by using X-ray diffraction and X-ray absorption fine structure (XAFS) of the Mn K-edge. These compounds with x≤3.0 adopt a NaZn13-type structure consisting of icosahedral clusters. The lattice constant increases with the Mn concentration. The calculated XAFS curves of the center and the corner sites in the icosahedral clusters for the Mn K-edge are obtained by using the program FEFF. The fitting result for the corner site agrees much better with the observed XAFS spectrum than that for the center site. Therefore, the Mn site is determined to be the corner Co site in the icosahedral clusters of all the compounds. In comparison with the crystallographic parameters of LaCo13, the icosahedral clusters composed of Mn atoms expand and the crystallographic Mn site is slightly more close to the La atom.

本文言語English
ページ(範囲)47-51
ページ数5
ジャーナルJournal of Alloys and Compounds
350
1-2
DOI
出版ステータスPublished - 2003 2 17

ASJC Scopus subject areas

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学

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