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- W2334996318 abstract "The dynamics of long range translation and local motions of oxygen in ${mathrm{SrTi}}_{0.2}{mathrm{Fe}}_{0.8}{mathrm{O}}_{3ensuremath{-}ensuremath{delta}}$ have been studied by electrical conductivity and quasielastic neutron scattering. The activation energy of the translational ionic diffusion measured by electrical conductivity is $0.97phantom{rule{0.3em}{0ex}}mathrm{eV}$ for $T>900phantom{rule{0.2em}{0ex}}ifmmode^circelsetextdegreefi{}mathrm{C}$. Both quasielastic linewidths and quasielastic intensities in neutron scattering show the presence of two motions. The $Q$ independences indicate a localized character for these oxygen diffusion modes with activation energies of 0.43 and $0.27phantom{rule{0.3em}{0ex}}mathrm{eV}$ for the ``fast'' and the ``slow'' local jumps, respectively. A model for the local oxygen motion is proposed involving oxygen jumps in the $(0phantom{rule{0.3em}{0ex}}kphantom{rule{0.3em}{0ex}}0)$ plane either directly to the next unit cell or performing detours combining two and two site jumps resulting in the same final momentum transfer." @default.
- W2334996318 created "2016-06-24" @default.
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- W2334996318 date "2006-12-12" @default.
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- W2334996318 title "Oxygen mobility in the perovskite<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi>SrTi</mml:mi><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mi>Fe</mml:mi><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mrow><mml:mn>3</mml:mn><mml:mo>−</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub><mml:mspace width=0.3em /><mml:mo>(</mml:mo><mml:mi>x</mml:mi><mml:mo…" @default.
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- W2334996318 doi "https://doi.org/10.1103/physrevb.74.214106" @default.
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