Indirect Exchange Interaction Among Gd in GdBa2(Cu1-xMx)3Oy (M = Ni, Co)

  • K. Senoh
  • F. Nakamura
  • T. Tamura
  • H. Fukuoka
  • Y. Ochiai
  • H. Shimizu
  • Y. Narahara
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 60)

Abstract

The specific heat of GdBa2(CU1-xMx)3Oy (M=Ni,Co) compounds was measured. Decrease of TN is observed with in-creasing x, however, it is larger in Ni substituted samples than in Co substituted ones. Ni-substituted samples at about 4 K have less value of entropy than samples of x=0, while Co concentration dependence of entropy is small in the Co-substituted samples. The effects of these substitutions on interactions among and to Gd ions are discussed.

Keywords

Entropy Univer 

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References

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Copyright information

© Springer-Verlag Berlin, Heidelberg 1992

Authors and Affiliations

  • K. Senoh
    • 1
  • F. Nakamura
    • 2
  • T. Tamura
    • 1
  • H. Fukuoka
    • 1
  • Y. Ochiai
    • 3
  • H. Shimizu
    • 4
  • Y. Narahara
    • 1
  1. 1.Institute of PhysicsUniversity of TsukubaIbaraki 305Japan
  2. 2.Department of PhysicsUniversity of HiroshimaHiroshima 730Japan
  3. 3.Institute of Material ScienceUniversity of TsukubaIbaraki 305Japan
  4. 4.Faculty of Science and TechnologyScience University of TokyoNoda, Chiba 278Japan

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