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- W4308309701 abstract "SrTi 0.5 Fe 0.5 O 3 − δ (STF) has emerged as a promising cathode material for solid oxide fuel cells due to its excellent high ionic and electronic conductivity. We investigated the strain-state in epitaxial STF thin films on LaAlO 3 (001) using synchrotron x-ray reciprocal space mapping measurement. The STF layer consists of two groups of compressively strained domains mixed horizontally in the film plane with a strain difference of about 1.4 %. The stress-free relaxed unit cell of more compressively strained domains, where a large degree of Sr segregation is expected, is relatively larger indicating that Sr segregation causes unit cell expansion. The lattice strain becomes gradually relaxed as the film thickness increases and the in-plane domain size decreases. We conjecture that the segregated Sr from compressively strained domains diffuse to the surface to form a layer of SrO x islands. • SrTi 0.5 Fe 0.5 O 3 − δ films consist of two groups of compressively strained domains. • Two groups of strained domains are mixed horizontally in the film plane. • Relaxed unit cell in more strained domains is larger implying high Sr segregation." @default.
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- W4308309701 date "2023-02-01" @default.
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- W4308309701 title "Strain relaxation in epitaxial SrTi0.5Fe0.5 O<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si5.svg display=inline id=d1e252><mml:msub><mml:mrow /><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math> thin films on LaAlO3: An X-ray reciprocal space mapping study" @default.
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- W4308309701 doi "https://doi.org/10.1016/j.jpcs.2022.111104" @default.
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