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Upper Critical Field Measurements for RBa2Cu3O7 (R = Y,Eu.9Y.1,Sm)

  • A. P. Ramirez
  • B. Batlogg
  • R. J. Cava
  • L. Schneemeyer
  • R. B. van Dover
  • E. A. Rietman
  • J. V. Waszczak

Abstract

We have measured the upper critical fields for superconducting RBa2Cu3O7 (R=Y,Eu.9Y.1,Sm) up to 27 Tesla, using the midpoint, Tm, of the resistance transition. At the highest fields we find critical field slopes of ∣dHc2/dTm∣ - 2.5, 2.1, and 3.3 Tesla/K for R = Y, Eu.9Y.1 and Sm, respectively, indicating insensitivity of pairing to local moment magnetism in these compounds. The normal state magnetoresistance is extremely small (<10-2).

Keywords

Critical Field Resistance Transition Local Moment Magnetism Electrical Lead High Field Region 
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Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • A. P. Ramirez
    • 1
  • B. Batlogg
    • 1
  • R. J. Cava
    • 1
  • L. Schneemeyer
    • 1
  • R. B. van Dover
    • 1
  • E. A. Rietman
    • 1
  • J. V. Waszczak
    • 1
  1. 1.AT&T Bell LaboratoriesMurray HillUSA

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