期刊
APPLIED PHYSICS LETTERS
卷 103, 期 17, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4826677
关键词
-
资金
- FP7 European project SUPER-IRON [283204]
We report on the isotropic pinning obtained in epitaxial Fe(Se,Te) thin films grown on CaF2(001) substrate. High critical current density values - larger than 1 MA/cm(2) in self field and liquid helium - are reached together with a very weak dependence on the magnetic field and a complete isotropy. Analysis through transmission electron microscopy evidences the presence of defects looking like lattice disorder at a very small scale, between 5 and 20 nm, which are thought to be responsible for such isotropic behavior in contrast to what was observed on SrTiO3, where defects parallel to the c-axis enhance pinning in that direction. (C) 2013 AIP Publishing LLC.
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