Local distortion around the guest ion in perovskite oxides

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

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1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Article number051101
JournalApplied Physics Express
Volume10
Issue number5
DOIs
Publication statusPublished - 2017 May 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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    Akama, S., Kobayashi, W., Niwa, H., Uchiyama, T., & Moritomo, Y. (2017). Local distortion around the guest ion in perovskite oxides. Applied Physics Express, 10(5), [051101]. https://doi.org/10.7567/APEX.10.051101