Magnetic properties of Dy in Pb2Sr2DyCu3O8

Superconductivity can be induced at high temperatures in Pb2Sr2RCu3O8 (R, r are earth) by partially doping Ca2+ for R3+. In order to understand the int erplay between magnetism and superconductivity, the magnetic properties of the parent compounds, Pb2Sr2RCu3O8 have been studied. The work presented he re includes magnetic susceptibility and specific heat measurements on R=Dy and extends our previous studies on R=Ce, Pr, Tb, Ho and Er. Specific heat experiments suggest that the Dy ions order magnetically with an ordering te mperature of 1.3 K. The magnetic susceptibility data are in good agreement with the susceptibility calculated using crystal-field parameters that are extrapolated from previous modeling of the R=Er and Ho analogs of this seri es. (C) 2000 Elsevier Science S.A. All rights reserved.