Correlation between magnetism and "dark stripes" in strained La1-xSrxCoO3 epitaxial films (0 ≤ x ≤ 0.1)

被引：15
|
作者：
Lan, Q. Q. [1 ,2 ]
Shen, X. [2 ]
Yang, H. W. [2 ]
Zhang, H. R. [2 ]
Zhang, J. [2 ]
Guan, X. X. [2 ]
Yao, Y. [2 ]
Wang, Y. G. [2 ]
Yu, R. C. [2 ]
Peng, Y. [1 ]
Sun, J. R. [2 ]
机构：
[1] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
[2] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 24期
基金：
中国国家自然科学基金;
关键词：
SPIN-STATE; POLARIZATION; TRANSITION;
D O I：
10.1063/1.4937562
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Using the technique of aberration-corrected scanning transmission electron microscopy, we performed a systematic analysis for the atomic lattice of the strained La1-xSrxCoO3(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. (c) 2015 AIP Publishing LLC.
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页数：4
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