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TEM and HREM Investigation of Secondary Dislocations in a Near‐Coincidence Σ19‐[011]‐Tilt Grain Boundary in Germanium
Author(s) -
Möller H. J.,
Griess M.
Publication year - 1992
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221720120
Subject(s) - coincidence , germanium , grain boundary , dislocation , condensed matter physics , crystallography , materials science , orientation (vector space) , lattice (music) , tilt (camera) , burgers vector , geometry , mathematics , physics , chemistry , silicon , metallurgy , microstructure , medicine , alternative medicine , pathology , acoustics
Germanium bicrystals with [011]‐tilt grain boundaries are grown by the two‐seed Czochralski method. Dissociated near‐coincidence grain boundaries with an orientation between Σ19 and Σ27 and asymmetric boundary planes contain networks of secondary dislocation which account for the deviation from the ideal coincidence orientation. Both conventional TEM and HREM are applied to determine the Burgers vectors and arrangements of the secondary dislocations. The complex dislocation structure can be analyzed and related to the Σ19 DSC lattice. The main result that uncommon and nonprimitive Burgers vectors are observed is discussed from the perspective of the total energy of the grain boundary.