Publication Date:
2015-12-15
Description:
Using the technique of aberration-corrected scanning transmission electron microscopy, we performed a systematic analysis for the atomic lattice of the strained La 1−x Sr x CoO 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.
Print ISSN:
0003-6951
Electronic ISSN:
1077-3118
Topics:
Physics
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