Raman scattering as a contactless room-temperature test of the quality of YBa2Cu3O7-x thin films

L. A. Farrow, Siu Wai Chan, L. H. Greene, W. L. Feldmann

Research output: Contribution to journalArticlepeer-review

Abstract

The room-temperature Raman spectrum of YBa2Cu3O 7-x is sensitive both to stoichiometry and to the transition from the semiconducting to the superconducting state as a function of oxygen annealing. In particular, it is shown that a good quality film with a Tc of ∼90 K and a sharp resistivity transition has not been produced if the frequency of the O(1) stretch along the c axis shifts from 500 cm -1 to lower frequencies. In this paper, two types of processing failures are illustrated: (1) lack of sufficient oxygen and (2) incorrect stoichiometry. No attempt has been made to predict Tc from the Raman data for less than optimum films.

Original languageEnglish (US)
Pages (from-to)2381-2383
Number of pages3
JournalJournal of Applied Physics
Volume65
Issue number6
DOIs
StatePublished - Dec 1 1989

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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