Unique nanostructural features in Fe, Mn-doped YBCO thin films

作者：Meledin A^*; Turner S; Cayado P; Mundet B; Solano E; Ricart S; Ros J; Puig T; Obradors X; Van Tendeloo G

来源：Superconductor Science and Technology, 2016, 29(12): 125009.

DOI：10.1088/0953-2048/29/12/125009

• coated conductor
• TEM
• nanocomposite
• YBa2Cu3O7
• YBaCuFeO5
• MnFe2O4
• nanoparticles

An attempt to grow a thin epitaxial composite film of YBa2Cu3O7-delta (YBCO) with spinel MnFe2O4 (MFO) nanoparticles on a LAO substrate using the CSD approach resulted in a decomposition of the spinel and various doping modes of YBCO with the Fe and Mn cations. These nanostructural effects lead to a lowering of T-c and a slight J(c) increase in field. Using a combination of advanced transmission electron microscopy (TEM) techniques such as atomic resolution high-angle annular dark field scanning TEM, energy dispersive x-ray spectroscopy and electron energy-loss spectroscopy we have been able to decipher and characterize the effects of the Fe and Mn doping on the film architecture. The YBaCuFeO5 anion-deficient double perovskite phase was detected in the form of 3D inclusions as well as epitaxially grown lamellas within the YBCO matrix. These

• 出版日期2016-12