Browsing by Author "Dwight, A. E."

Now showing items 1-4 of 4

    • Article  

      Phonon and electron anomalies in the perovskite superconductor (La1.85Sr0.15)Cu0.95Sn0.05O4 

      Giapintzakis, John; Matykiewicz, J. M.; Kimball, C. W.; Dwight, A. E.; Dunlap, B. D.; Slaski, M.; Fradin, F. Y. (1987)
      Mössbauer measurements have been made at 199Sn in the perovskite superconductors La1.85Sr0.15Cu1-xSnxO4. The Sn valence is 4+ for all concentrations. The temperature dependence of the mean-squared displacement for x=0.05 ...
    • Article  

      Superconducting and magnetic properties of Fe-doped oxide superconductors 

      Kimball, C. W.; Matykiewicz, J. L.; Giapintzakis, John; Dwight, A. E.; Brodsky, M. B.; Slaski, M.; Dunlap, B. D.; Fradin, F. Y. (1987)
      The superconducting and magnetic properties of the compounds La1.85Sr0.15Cu1-xFexO4 and YBa2(Cu1-xFex)3O7-y with 0<x<0.1 are presented. The Fe substitution in the La-Sr compound rapidly depresses Tc, extrapolating to Tc=0 ...
    • Article  

      Superconducting and magnetic properties of the oxide superconductors La1.85Sr0.15Cu1-xFexO4 

      Matykiewicz, J. M.; Kimball, C. W.; Giapintzakis, John; Dwight, A. E.; Brodsky, M. B.; Dunlap, B. D.; Slaski, M.; Fradin, F. Y. (1987)
      Mössbauer and magnetic measurements have been made in the perovskite superconductors La1.85Sr0.15Cu1-x57FexO4 for x=0.0025, 0.005, 0.01, 0.05 and 0.10. The superconducting transition temperature is rapidly depressed as x ...
    • Article  

      Vibrational and electronic anomalies near Tc in tetragonal superconducting YBa2(Cu0.9557Fe0.05)3O7.1 

      Kimball, C. W.; Matykiewicz, J. L.; Lee, H.; Giapintzakis, John; Dwight, A. E.; Dunlap, B. D.; Jorgensen, J. D.; Veal, B. W.; Fradin, F. Y. (1988)
      Mössbauer effect studies have been made as a function of temperature for the orthorhombic (χ=0.01, 0.02) and tetragonal (χ=0.05) superconducting compounds YBa2(Cu1-χ57Feχ)3O7 + y. For Fe in or slightly displaced from the ...