© 2016 IOP Publishing Ltd. An attempt to grow a thin epitaxial composite film of YBa2Cu3O7-δ (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 nano-inclusions play a positive role as pinning centers responsible for the J c/J sf (H) dependency smoothening at high magnetic fields in the YBCO-MFO films with respect to the pristine YBCO films.
- coated conductor
- MnFe O 2 4
- YBa Cu O 2 3 7
- YBaCuFeO 5
Meledin, A., Turner, S., Cayado, P., Mundet, B., Solano, E., Ricart, S., Ros, J., Puig, T., Obradors, X., & Van Tendeloo, G. (2016). Unique nanostructural features in Fe, Mn-doped YBCO thin films. Superconductor Science and Technology, 29(12), . https://doi.org/10.1088/0953-2048/29/12/125009