Magnetic pinning effects of epitaxial LaxSr1-xMnO3 nanostructured thin films on YBa2Cu3O7-δ layers

被引：18
|
作者：
Petrisor, T., Jr. [1 ,2 ]
Gabor, M. S. [1 ]
Tiusan, C. [1 ,2 ]
Galluzzi, V. [3 ]
Celentano, G. [3 ]
Popa, S. [4 ]
Boulle, A. [5 ]
Petrisor, T. [1 ]
机构：
[1] Tech Univ Cluj Napoca, Ctr Superconduct Spintron & Surface Sci C4S, Cluj Napoca 400114, Romania
[2] Nancy Univ, Inst Jean Lamour, CNRS, UMR 7198, Vandoeuvre Les Nancy, France
[3] Assoc EURATOM ENEA Fus, Frascati Res Ctr, I-00044 Rome, Italy
[4] Natl Inst Mat Phys, Bucharest 077125, Magurele, Romania
[5] Ctr Europeen Ceram, CNRS, UMR 6638, F-87068 Limoges, France
来源：
JOURNAL OF APPLIED PHYSICS | 2012年 / 112卷 / 05期
关键词：
STRAIN FIELDS; LA0.7SR0.3MNO3; ANISOTROPY; SINGLE;
D O I：
10.1063/1.4748049
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The present paper presents the effects of a nanostructured, ferromagnetic La1-xSrxMnO3(LSMO) thin film on the pinning characteristics of an epitaxial YBa2Cu3O7(YBCO) thin film deposited on top. Ordered arrays of LSMO grains were obtained upon growing the film on a terraced (001) SrTiO3 substrate. The analyses of magnetic measurements revealed the presence of a complex vortex pinning mechanism within the YBCO film. With respect to a reference single YBCO layer, an additional pinning potential was observed. Its temperature evolution suggests that a magnetic pinning mechanism is responsible for improved pinning characteristics in the high temperature and field region. Based on the morphology of the underlying LSMO buffer, a strong pinning force is expected to arise due to the anti-dot formations, where a high magnetization gradient exists. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4748049]
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页数：7
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