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Structural and Magnetic Properties of RBa2Cu2NbO8 (R = La, Pr, Nd)

Published online by Cambridge University Press:  26 February 2011

H. B. Radousky ,
J. C. O'Brien ,
M. Bennahmias ,
P. Klavins ,
C. A. Smith ,
J. M. Link ,
T. J. Goodwin  and
R. N. Shelton
H. B. Radousky
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA UC - Davis, Department of Physics, Davis, CA 95616, USA
J. C. O'Brien
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
M. Bennahmias
Affiliation:
Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
P. Klavins
Affiliation:
UC - Davis, Department of Physics, Davis, CA 95616, USA
C. A. Smith
Affiliation:
UC - Davis, Department of Physics, Davis, CA 95616, USA
J. M. Link
Affiliation:
UC - Davis, Department of Physics, Davis, CA 95616, USA
T. J. Goodwin
Affiliation:
UC - Davis, Department of Physics, Davis, CA 95616, USA
R. N. Shelton
Affiliation:
UC - Davis, Department of Physics, Davis, CA 95616, USA
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Abstract

PrBa2Cu2NbO8 (PrBCNO) is an insulating analog to the YB2CU3O7 (YBCO) 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 NbO2 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 113
Copyright
Copyright © Materials Research Society 1992

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