Authors: T Mitsuma T Tohei N Shibata T Mizoguchi T Yamamoto Y Ikuhara
Publish Date: 2011/01/25
Volume: 46, Issue: 12, Pages: 4162-4168
Abstract
In this study we fabricated a bicrystal of SrTiO3 containing a Σ = 9 110/221 symmetric tilt grain boundary GB and its atomistic structure was directly observed by transmission electron microscopy TEM and scanning TEM STEM We theoretically estimated the most stable structure by first principles calculations and by combining this with TEM images determined the atomistic structure of the Σ = 9 grain boundary We found that when the grain boundary is slightly tilted from the coincident site lattice CSL orientation displacement shift complete DSC dislocations are introduced at the grain boundary to accommodate the misorientation between the two adjacent crystals while the most stable atomic structure remains unchangedA part of this study was supported by GrantinAid for Scientific Research on Priority Areas “Nano Materials Science for Atomic Scale Modification 474” and A 2224608 from Ministry of Education Culture Sports Science and Technology MEXT of Japan
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