Local distortion around the guest ion in perovskite oxides

Shota Akama, Wataru Kobayashi, Hideharu Niwa, Tomoki Uchiyama, Yutaka Moritomo

研究成果: Article査読

1 被引用数 (Scopus)

抄録

In transition metal (M) oxides, partial substitution of guest (Mg) for host (Mh) elements causes local distortion via the difference in the ionic radius (r). Here, we systematically investigated the local structures in the pure (x = 0.0) and mixed (x = 0.1) perovskite oxides, LaMh 1-x,Mg x O3, by means of extended X-ray absorption fine structure (EXAFS) analysis. We found that the local distortion [ϵ≡√(1/3)Σx,y,z(Δdh ad)2 where Δdh adis the variation in the adjacent Mh-O bond length] in a mixed compound, was smaller than that in the virtual compound, in which the Mh-O bond length had an ideal value. This empirical relation is useful for designing a functional material by partial substitution.

本文言語English
論文番号051101
ジャーナルApplied Physics Express
10
5
DOI
出版ステータスPublished - 2017 5月 1
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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