Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Comparison of the pressure dependencies of T/sub c/ in the 90-K superconductors RBa/sub 2/Cu/sub 3/O/sub x/ (R = Gd, Er, and Yb) and YBa/sub 2/Cu/sub 3/O/sub x/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
We have determined the effect of pressure P on the resistance and superconducting transition temperature T/sub c/ of RBa/sub 2/Cu/sub 3/O/sub x/ (R = Gd, Er, and Yb) and compare our results to those obtained on high quality YBa/sub 2/Cu/sub 3/O/sub x/. The transition temperature, which is 90 K or greater at ambient pressure for all four compounds, is enhanced by pressure in each at rates between 0.09 and 0.19 K/kbar. Interestingly, the presence of a localized moment in the rare-earth compounds appears to have no influence on the pressure response. From the positive dT/sub c//dP we infer a positive change in the thermal expansion upon entering the superconducting state.
Research Organization:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI ID:
5828588
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:4; ISSN PRBMD
Country of Publication:
United States
Language:
English