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Oxygen diffusion along the short-circuit paths in bicrystal SrTiO3

Published online by Cambridge University Press:  31 January 2011

Isao Sakaguchi ,
Manabu Komastu ,
Akio Watanabe  and
Hajime Haneda
Isao Sakaguchi
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
Manabu Komastu
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
Akio Watanabe
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
Hajime Haneda
Affiliation:
National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305–0044, Japan
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Abstract

Oxygen diffusion in bicrystal SrTiO3 was investigated with the aid of resistive anode encoder of secondary-ion mass spectrometry. The diffusion profiles of 18O on volume, grain boundary (joining interface), and dislocation were separately determined from the three-dimensional distribution of 18O in the bicrystal SrTiO3. The volume diffusion of oxygen is found to be dependent on (i) Nb doping concentration, (ii) crystallographic orientation, and (iii) nonequilibrium oxygen defects that are annihilated by thermal annealing. The feature of 18O diffusion image along the dislocation in (100) and (110) bicrystals can be explained by the dislocation array introduced by the mechanical polishing.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 15 , Issue 12 , December 2000 , pp. 2598 - 2601
Copyright
Copyright © Materials Research Society 2000

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