Local distortion around the guest ion in perovskite oxides. (10th April 2017)

• Record Type: Journal Article
• Authors: Akama, Shota; Kobayashi, Wataru; Niwa, Hideharu; Uchiyama, Tomoki; Moritomo, Yutaka
• Is Part Of: Applied physics express. Volume 10:Number 5(2017)
• Publication Date: 2017-04-10
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.10.051101
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: In transition metal ( M ) oxides, partial substitution of guest ( M g ) for host ( M h ) 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, , by means of extended X-ray absorption fine structure (EXAFS) analysis. We found that the local distortion [, where is the variation in the adjacent M h –O bond length] in a mixed compound, was smaller than that in the virtual compound, in which the M g –O bond length had an ideal value. This empirical relation is useful for designing a functional material by partial substitution.