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Structural, and magnetic properties of RBa sub 2 Cu sub 2 NbO sub 8 (R = La, Pr and Nd)

Conference ·
OSTI ID:5266983
 [1]; ;  [2]; ; ; ; ;  [3]
  1. Lawrence Livermore National Lab., CA (United States) California Univ., Davis, CA (United States). Dept. of Physics
  2. Lawrence Livermore National Lab., CA (United States)
  3. California Univ., Davis, CA (United States). Dept. of Physics
+ Show Author Affiliations

PrBa{sub 2}Cu{sub 2}NbO{sub 8} (PrBCNO) is an insulating analog to the YBa{sub 2}Cu{sub 3}O{sub 7} (YUBCO) system, which is interesting as a thin film buffer layer in YBCO/PrBCNO/YBCO tunnel junctions as well as a potential high {Tc} superconductor if proper doping could be achieved. PrBCNO has a similar structure to PrBCO, with NbO{sub 2} planes replacing the CuO chains. Single phase polycrystalline samples of RBCNO have been synthesized with R = La, Pr and Nd. Attempts to synthesize this structure with the smaller ions Y and Gd have been unsuccessful. The PrBCNO samples show a signature in the magnetization of a magnetic ordering at 12 K. No such magnetic phase transition is observed down to 2 K in the NdBCNO material.

Research Organization:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Organization:
DOE; NSF; USDOE, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
5266983
Report Number(s):
UCRL-JC-109064; CONF-920402--14; ON: DE92014780; CNN: DMR-90-21029
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIC PROPERTIES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES