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

A. Meledin, S. Turner, P. Cayado, B. Mundet, E. Solano, S. Ricart, J. Ros, T. Puig, X. Obradors, G. Van Tendeloo

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8 Citations (Scopus)

Abstract

© 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.
Original languageEnglish
Article number125009
JournalSuperconductor Science and Technology
Volume29
Issue number12
DOIs
Publication statusPublished - 21 Oct 2016

Keywords

  • coated conductor
  • MnFe O 2 4
  • nanocomposite
  • nanoparticles
  • TEM
  • YBa Cu O 2 3 7
  • YBaCuFeO 5

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    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), [125009]. https://doi.org/10.1088/0953-2048/29/12/125009