Threading dislocations in La0.67Sr0.33MnO3/SrTiO3 superlattice. (1st September 2013)

• Record Type: Journal Article
• Authors: He, Ming; Lin, Long; Tao, Hualong; Qiu, Minghui; Zou, Binyan; Zhang, Zhihua
• Is Part Of: Micro & nano letters. Volume 8:Number 9(2013)
• Page Start: 512
• Page End: 514
• Publication Date: 2013-09-01
• Subjects: crystal field interactions -- dislocations -- electron energy loss spectra -- lanthanum compounds -- strontium compounds -- superlattices -- transmission electron microscopy; threading dislocations -- superlattice -- transmission electron microscopy -- predominant defects -- density -- Burgers vectors -- electron energy loss spectra -- nonstoichiometry -- crystal field -- La0.67Sr0.33MnO3‐SrTiO3; Nanotechnology -- Periodicals; Nanostructures -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1049/mnl.2013.0411
• Languages: English
• ISSNs: 1750-0443

Abstract

Abstract : Transmission electron microscopy‐related experiments were performed on a La0.67 Sr0.33 MnO3 /SrTiO3 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.