High-resolution and energy-filtered transmission electron microscopy of YBa2Cu3O7-x/PrBa2Cu3 O7 superlattices

M. Varela, C. Ballesteros, W. Grogger, K. M. Krishnan, D. Arias, Z. Sefrioui, C. León, J. Santamaría

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Structural disorder induced by epitaxial strain relaxation in c-axis oriented [YBa2Cu3O7-x n u.c/PrBa2Cu3O7 5 u.c.] superlattices on (100) SrTiO3 substrates has been analyzed by high-resolution and energy-filtered transmission electron microscopy. Epitaxial strain shows up in ultrathin YBCO layers with thickness below 4 unit cells. Strain relaxation takes place when layer thickness increases above this value. Microscopy observations for epitaxially strained superlattices show a good morphology of the layers, with sharp and flat interfaces. However, in relaxed samples rougher interfaces are observed, together with microdomains showing the c-axis parallel to the substrate plane which preserve the superlattice compositional profile. Such microdomains of c-parallel growth provide a path for reduced lattice mismatch, conforming a very efficient mechanism for strain relaxation.

Original languageEnglish
Pages (from-to)558-561
Number of pages4
JournalJournal of Alloys and Compounds
Volume323-324
DOIs
Publication statusPublished - 12 Jul 2001
Externally publishedYes
Event4th International Conference on f-Elements - Madrid, Spain
Duration: 17 Sep 200021 Sep 2000

Keywords

  • A. high-Tc superconductors
  • A. thin films
  • C. scanning and transmission electron microscopy

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'High-resolution and energy-filtered transmission electron microscopy of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub>/PrBa<sub>2</sub>Cu<sub>3</sub> O<sub>7</sub> superlattices'. Together they form a unique fingerprint.

  • Cite this