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Title: Correlation between magnetism and “dark stripes” in strained La{sub 1−x}Sr{sub x}CoO{sub 3} epitaxial films (0 ≤ x ≤ 0.1)

Using the technique of aberration-corrected scanning transmission electron microscopy, we performed a systematic analysis for the atomic lattice of the strained La{sub 1−x}Sr{sub x}CoO{sub 3} (0 ≤ x ≤ 0.1) epitaxial films, which have drawn a great attention in recent years because of their anomalous magnetism. Superstructures characterized by dark stripes are observed in the lattice image, evolving with combined Sr-doping and lattice strains. Fascinatingly, we found a close relation between the proportion of the Co ions in dark stripes and the saturation magnetization of the film: the latter grows linearly with the former. This result implies that the magnetism could be exclusively ascribed to the Co ions in dark stripes.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ; ;  [3] ;  [1]
  1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China)
  2. (China)
  3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
Publication Date:
OSTI Identifier:
22486239
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COBALT IONS; CORRELATIONS; EPITAXY; FILMS; IMAGES; MAGNETISM; MAGNETIZATION; SATURATION; STRAINS; TRANSMISSION ELECTRON MICROSCOPY