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

Journal Article · Mon Dec 14 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4937562· OSTI ID:22486239

Lan, Q. Q. ^[1]; Shen, X.; Yang, H. W.; Zhang, H. R.; Zhang, J.; Guan, X. X.; Yao, Y.; Wang, Y. G.

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1. Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000 (China)

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.

• OSTI ID: 22486239
• Journal Information: Applied Physics Letters, Vol. 107, Issue 24; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COBALT IONS
CORRELATIONS
EPITAXY
FILMS
IMAGES
MAGNETISM
MAGNETIZATION
SATURATION
STRAINS
TRANSMISSION ELECTRON MICROSCOPY