TY - JOUR
T1 - Raman study on Bi-Pb-Sr-Ca-Cu-O superconductor thin films grown by spray pyrolysis on several types of substrate
AU - Mejía-García, C.
AU - Díaz-Valdés, E.
AU - Contreras-Puente, G.
AU - López-López, J. L.
AU - Jergel, M.
N1 - Funding Information:
We gratefully acknowledge the financial support by CONACyT, Reference 34074-U, Mexico. The authors would like to thank Werner Griesel (University of Bayreuth, Germany) for his support of the computer work, and to Alejandro Morales (CINVESTAV-IPN, México) for his technical assistance with the electrical measurements.
PY - 2002/7/1
Y1 - 2002/7/1
N2 - 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.
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.
KW - Bi-Pb-Sr-Ca-Cu-O [(BP)SCCO] thin films
KW - Optical properties
KW - Raman scattering
UR - http://www.scopus.com/inward/record.url?scp=0036647529&partnerID=8YFLogxK
U2 - 10.1016/S0040-6090(02)00445-5
DO - 10.1016/S0040-6090(02)00445-5
M3 - Artículo
SN - 0040-6090
VL - 414
SP - 123
EP - 128
JO - Thin Solid Films
JF - Thin Solid Films
IS - 1
ER -