Magnetic, structural, and Raman characterization of R Ba sub 2 Cu sub 2 NbO sub 8 ( R =Pr, La, or Nd)

Journal Article · Sat Oct 31 23:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.46.11986· OSTI ID:7028477

Bennahmias, M; O'Brien, J C ^[1]; Radousky, H B ^[2]; Goodwin, T J; Klavins, P; Link, J M; Smith, C A; Shelton, R N ^[3]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States) Department of Physics, University of California, Davis, Davis, California 95616 (United States)
3. Department of Physics, University of California, Davis, Davis, California 95616 (United States)

PrBa{sub 2}Cu{sub 2}NbO{sub 8} (PrBCNO) is an insulator analogous to the PrBa{sub 2}Cu{sub 3}O{sub 7} system having a similar structure but with NbO{sub 2} planes replacing the CuO chains. Single-phase polycrystalline samples of {ital R}BCNO have been synthesized with {ital R}=La, Pr, or Nd. These materials were characterized using magnetization, thermal gravimetric analysis in different atmospheres, x-ray diffraction, and Raman spectroscopy. 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 NdBa{sub 2}Cu{sub 2}NbO{sub 8}.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7028477
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 46:18; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL ANALYSIS
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
GRAVIMETRIC ANALYSIS
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MAGNETIZATION
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
NIOBIUM COMPOUNDS
NIOBIUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PRASEODYMIUM COMPOUNDS
PRASEODYMIUM OXIDES
QUANTITATIVE CHEMICAL ANALYSIS
RAMAN SPECTRA
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
SPECTRA
SUPERCONDUCTORS
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
TRANSITION ELEMENT COMPOUNDS