Fabrication of Nd1-xCaxBa2Cu 3O7-δ (x = 0-0.3) single crystalline films by tri-phase epitaxy

R. Takahashi, Y. Matsumoto, T. Kohno, M. Kawasaki, H. Koinuma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In order to fabricate single crystalline films with controlled carrier concentration, we have applied the tri-phase epitaxy (TPE) for Ca doped NdBa2Cu3O7-δ (NCBCO). The TPE is a process to deposit a solid thin film from a thin liquid layer, while film precursors are being fed from the gas phase into the liquid layer to maintain the quasi-equilibrium between the growing solid layer and the overlying liquid layer. The NCBCO films were prepared by the TPE using pulsed laser deposition (PLD) under the conditions designed from the thermodynamic phase diagram. The NCBCO TPE film obtained, exhibited a higher crystallinity and a larger grain size as compared with the film by the conventional PLD without using the liquid flux layer. The TPE films had atomically flat surfaces with 1.2nm height steps, which corresponded to the lattice constant along the c-axis of the crystal structure. In the NCBCO TPE films, Ca was homogeneously distributed over the film thickness. By the post-annealing for incorporation of oxygen in the film, we could obtain crack free superconducting NCBCO films.

Original languageEnglish
Pages (from-to)308-312
Number of pages5
JournalJournal of Crystal Growth
Volume262
Issue number1-4
DOIs
Publication statusPublished - 2004 Feb 15
Externally publishedYes

Keywords

  • A1. Phase equilibria
  • A3. Laser epitaxy
  • B1. Oxides
  • B2. Superconducting materials

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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