Cation off-stoichiometric effect on superconducting GdBa2Cu 3O7-δ thin films investigated by Raman spectroscopy

T. Kakeshita, K. Hirose, T. Yokoyama, S. Lee

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Abstract

The superconducting properties of cation off-stoichiometric GdB 2Cu3O7-δ (Gd123) thin film grown by pulsed laser deposition method show a strong dependence on target compositions and particularly get worse in case of a ratio Ba/Gd>2. We investigated the effect of cation off-stoichiometric target sample on lattice properties of Gd123 thin films using Raman spectroscopy. In addition to five Ag modes related to ortho-I phase, some additional peaks are seen in the films of Ba/Gd>2. The result implies that the superconducting properties of the films are strongly influenced by the cation off-stoichiometric effect and in connection with the existence of additional peaks.

Original languageEnglish
Article number113911
JournalJournal of Applied Physics
Volume115
Issue number11
DOIs
Publication statusPublished - 2014 Mar 21

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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