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Evidence of granular superconductivity in Pr[sub 2[minus]z]Ce[sub z]Sr[sub 2]Cu[sub 2]NbO[sub 10]

Conference · · International Journal of Modern Physics B
OSTI ID:6384347
;  [1];  [2];  [3]; ;  [4]
  1. Univ. of Notre Dame, IN (United States). Physics Dept.
  2. Arizona State Univ., Tempe, AZ (United States). Dept. of Physics National High Magnetic Field Lab., Tallahassee, FL (United States)
  3. Hebrew Univ., Jerusalem (Israel). Raccah Inst. of Physics
  4. Univ. of Missouri, Columbia, MO (United States). Research Reactor Facility

Pr[sub 2[minus]z]Ce[sub z]Sr[sub 2]Cu[sub 2]NbO[sub 10] (Pr222Nb10), is widely believed to not superconduct, although its homologues in which Pr is replaced by Nd, Sm, Eu, or Gd do (with [Tc] [approx] 28 K). On the basis of bulk resistivity, bulk diamagnetism, electron spin resonance, and surface resistance measurements of Pr222Nb10, the authors conclude that it does exhibit granular superconductivity (as predicted) with a critical temperature in the range 25--29 K, but is not currently a bulk superconductor. Neutron diffraction studies show that the Pr222Nb10 is multi-phase, but does not contain significant amounts of any (known) superconducting phase.

Sponsoring Organization:
DOE; USDOE, Washington, DC (United States)
DOE Contract Number:
FG02-90ER45427
OSTI ID:
6384347
Report Number(s):
CONF-980291--
Journal Information:
International Journal of Modern Physics B, Journal Name: International Journal of Modern Physics B Vol. 12:29-31; ISSN IJPBEV; ISSN 0217-9792
Country of Publication:
United States
Language:
English