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Monoclinic Ferroelastic Domains in LaCoO 3 ‐Based Perovskites
Author(s) -
Vullum P. E.,
Holmestad R.,
Lein H. L.,
Mastin J.,
Einarsrud M.A.,
Grande T.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200700021
Subject(s) - crystal twinning , monoclinic crystal system , materials science , superstructure , crystallography , transmission electron microscopy , trigonal crystal system , perovskite (structure) , macle , condensed matter physics , crystal structure , nanotechnology , microstructure , thermodynamics , metallurgy , chemistry , physics
In addition to the well known ferroelastic domains formed by deformation twinning in rhombohedral perovskites, a monoclinic structure is observed by transmission electron microscopy in LaCoO 3 ‐based materials. The monoclinic domains consist of a one‐dimensional superstructure corresponding to doubling or tripling of the pseudo cubic unit cell due to twinning at the atomic scale, as shown in the figure.