Raman study on Bi-Pb-Sr-Ca-Cu-O superconductor thin films grown by spray pyrolysis on several types of substrate

C. Mejía-García, E. Díaz-Valdés, G. Contreras-Puente, J. L. López-López, M. Jergel

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We present a Raman study on Bi-Pb-Sr-Ca-Cu-O thin films grown by spray pyrolysis on three different types of substrate, MgO, LaAlO3 and SrTiO3. We applied the technique of Raman difference spectroscopy to obtain a signal representing the spectrum from the Bi-Pb-Sr-Ca-Cu-O thin films, since the contribution of the Raman signal from the underlying substrate may overwhelm the scattering arising from the films. The films investigated were prepared by a two-step procedure, i.e. by the deposition of films on substrates from an aerosol of aqueous nitrate solution, followed by solid-state reaction at high temperature. The Raman spectra between 380 and 800 cm-1 show a series of vibrational optical modes, all of them apparently superimposed on an electronic background. A Fano-type analysis was performed of the lineshape as a function of temperature for the most important modes, which can be associated with stabilization of the phase and related to the Cu-O plane, where superconductivity apparently originates. © 2002 Elsevier Science B.V. All rights reserved.
Original languageAmerican English
Pages (from-to)123-128
Number of pages110
JournalThin Solid Films
DOIs
StatePublished - 1 Jul 2002

Fingerprint

BSCCO superconductors
Spray pyrolysis
Superconducting materials
pyrolysis
sprayers
Thin films
Temperature
Raman Spectrum Analysis
Substrates
thin films
Aerosols
Nitrates
Superconductivity
Solid state reactions
nitrates
Raman scattering
aerosols
superconductivity
Stabilization
stabilization

Cite this

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title = "Raman study on Bi-Pb-Sr-Ca-Cu-O superconductor thin films grown by spray pyrolysis on several types of substrate",
abstract = "We present a Raman study on Bi-Pb-Sr-Ca-Cu-O thin films grown by spray pyrolysis on three different types of substrate, MgO, LaAlO3 and SrTiO3. We applied the technique of Raman difference spectroscopy to obtain a signal representing the spectrum from the Bi-Pb-Sr-Ca-Cu-O thin films, since the contribution of the Raman signal from the underlying substrate may overwhelm the scattering arising from the films. The films investigated were prepared by a two-step procedure, i.e. by the deposition of films on substrates from an aerosol of aqueous nitrate solution, followed by solid-state reaction at high temperature. The Raman spectra between 380 and 800 cm-1 show a series of vibrational optical modes, all of them apparently superimposed on an electronic background. A Fano-type analysis was performed of the lineshape as a function of temperature for the most important modes, which can be associated with stabilization of the phase and related to the Cu-O plane, where superconductivity apparently originates. {\circledC} 2002 Elsevier Science B.V. All rights reserved.",
author = "C. Mej{\'i}a-Garc{\'i}a and E. D{\'i}az-Vald{\'e}s and G. Contreras-Puente and L{\'o}pez-L{\'o}pez, {J. L.} and M. Jergel",
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Raman study on Bi-Pb-Sr-Ca-Cu-O superconductor thin films grown by spray pyrolysis on several types of substrate. / Mejía-García, C.; Díaz-Valdés, E.; Contreras-Puente, G.; López-López, J. L.; Jergel, M.

In: Thin Solid Films, 01.07.2002, p. 123-128.

Research output: Contribution to journalArticle

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AB - We present a Raman study on Bi-Pb-Sr-Ca-Cu-O thin films grown by spray pyrolysis on three different types of substrate, MgO, LaAlO3 and SrTiO3. We applied the technique of Raman difference spectroscopy to obtain a signal representing the spectrum from the Bi-Pb-Sr-Ca-Cu-O thin films, since the contribution of the Raman signal from the underlying substrate may overwhelm the scattering arising from the films. The films investigated were prepared by a two-step procedure, i.e. by the deposition of films on substrates from an aerosol of aqueous nitrate solution, followed by solid-state reaction at high temperature. The Raman spectra between 380 and 800 cm-1 show a series of vibrational optical modes, all of them apparently superimposed on an electronic background. A Fano-type analysis was performed of the lineshape as a function of temperature for the most important modes, which can be associated with stabilization of the phase and related to the Cu-O plane, where superconductivity apparently originates. © 2002 Elsevier Science B.V. All rights reserved.

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