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Raman spectroscopy, in which a laser beam serves the dual role of exciting the Raman spectrum and annealing the sample, shows promise as a means of investigating oxygen effects in the oxide superconductors. A technique is described, based on measurements of the ratios of the areas of corresponding peaks in the anti-Stokes and Stokes spectra, whereby the temperature of the illuminated region of the sample can be determined as a function of the power in the incident laser beam. It is found that, for sintered samples of bismuth 2122, a small correction must be made for the departure from thermodynamic equilibrium induced by the pumping effect of the laser beam.
bismuth oxides, calcium oxides, strontium oxides, copper oxides, high-tc superconductors, sintering, laser radiation, annealing, excitation, raman spectra, temperature measurement
Shi, Y. H.; Lee, M.J. G.; Moskovits, M.; Hsu, A.; and Carpick, Robert W., "Laser heating of a sintered oxide superconductor" (1991). Departmental Papers (MEAM). 100.
Date Posted: 25 June 2007
This document has been peer reviewed.