Open AccessThreading dislocations in La 0.67 Sr 0.33 MnO 3 /SrTiO 3 superlattice
Author(s) -
He Ming,
Lin Long,
Tao Hualong,
Qiu Minghui,
Zou Binyan,
Zhang Zhihua
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0411
Subject(s) - superlattice , materials science , condensed matter physics , burgers vector , perpendicular , stoichiometry , transmission electron microscopy , crystallography , crystal (programming language) , chemistry , physics , nanotechnology , geometry , mathematics , organic chemistry , computer science , programming language
Transmission electron microscopy‐related experiments were performed on a La 0.67 Sr 0.33 MnO 3 /SrTiO 3 superlattice. The predominant defects in the superlattice are a high density of threading dislocations (TDs) perpendicular or quasi‐perpendicular to the substrate surface. The TDs are mostly pure‐edge‐type with Burgers vectors b = 〈100〉 or 〈110〉. A few TDs of screw character with Burgers vectors ± [001] were also found. Electron energy loss spectra show that non‐stoichiometry is accommodated in the near‐interface region of the superlattice. The stronger crystal field induced by defect and non‐stoichiometry are accounted for by the observed macroscopic properties.