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Oxygen diffusion in high- Tc superconductors

Description: The cuprate superconductors are fascinating not only because of their technical promise, but also because of their structures, especially the anisotropy of the crystal lattice. There are some structural similarities among these compounds, but also significant differences. Measurements of the oxygen tracer diffusion coefficients have been carried out as a function of temperature, oxygen partial pressure, crystal orientation, and doping in the La-Sr-Cu-0, Y-Ba-Cu-0, and Bi-Sr-Ca-Cu-0 systems. The… more
Date: July 1, 1992
Creator: Rothman, S. J. & Routbort, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Oxygen diffusion in high-{Tc} superconductors

Description: The cuprate superconductors are fascinating not only because of their technical promise, but also because of their structures, especially the anisotropy of the crystal lattice. There are some structural similarities among these compounds, but also significant differences. Measurements of the oxygen tracer diffusion coefficients have been carried out as a function of temperature, oxygen partial pressure, crystal orientation, and doping in the La-Sr-Cu-0, Y-Ba-Cu-0, and Bi-Sr-Ca-Cu-0 systems. The… more
Date: July 1, 1992
Creator: Rothman, S. J. & Routbort, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Self-Diffusion in Beta Uranium. Partial Report--Metallurgy Division Program 4.1.2

Description: The self-diffusion coefficient of U decreased from 3 x 10/sup -9/ cm/sup 2//sec at 785 deg C to 2.1 x 10/sup -11/ cm/sup 2//sec at 760 deg C. At temperatares high in the beta phase, the plots of log C vs. X/sup 2/ are curved, indicating that self-diffusion in beta U does not take place by isotropic volume diffusion alone. (auth)
Date: July 1, 1960
Creator: Rothman, S. J.; Gray, J., Jr.; Hughes, J. P. & Harkness, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Self-Diffusion in Gamma Uranium

Description: The self-diffusion coefficient or uranium was measured at four temperatures in the gamma phase. The data are fitted by an Arrhenius-tyoe equation D = 2.33 x well with previously reported results. The value of D/sub o/ is lower than that predicted by Zener's theory, and the activation energy is much less than the value expected from various empirical codelations. (auth)
Date: July 1, 1959
Creator: Rothman, S. J.; Lloyd, L. T.; Weil, R. & Harkness, A. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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