Structural and Superconducting Properties of La2-xRxBa2CayCu4+yO10+δ (R=Nd, Gd; Y=2x) System

Author

D. G. Kuberkar
R. S. Thampi
Nikesh A. Shah
Krushna Mavani
S. Rayaprol
R. G. Kulkarni
S. K. Malik
William B. Yelon, Missouri University of Science and TechnologyFollow

Abstract

A Non superconducting La₂Ba₂Cu₄O_9+δ system has been made superconducting by the addition of CaCuO2, along with rare earth doping at the La site, with the stoichiometric composition La_2-xR_xCa_yBa₂Cu_4+yO_10+δ (R=Nd, Gd, and y=2x). All the samples with 0.0 < x < 0.5; y=2x were characterized by x-ray diffraction and neutron diffraction measurements for structural properties and by ac susceptibility, dc resistivity, and iodometric analysis for superconducting properties. The x=0.0 sample displays semiconducting behavior. Increasing x increases Tc from less than 15 K for Nd/Gd samples with x=0.1 to ∼78 K for x=0.5 samples. It is interesting to note that the hole concentration and T_c exhibit a strong correlation with increasing dopant concentration. Neutron diffraction studies confirm the occupancy of Ca and Nd ions at the La site with a concomitant displacement of La on to the Ba site. © 2001 American Institute of Physics.

Recommended Citation

D. G. Kuberkar et al., "Structural and Superconducting Properties of La2-xRxBa2CayCu4+yO10+δ (R=Nd, Gd; Y=2x) System," Journal of Applied Physics, vol. 89, no. 11 II, pp. 7657 - 7659, American Institute of Physics, Jun 2001.

The definitive version is available at https://doi.org/10.1063/1.1359464

Department(s)

Physics

Publication Status

Available Access

International Standard Serial Number (ISSN)

0021-8979

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2024 American Institute of Physics, All rights reserved.

Publication Date

01 Jun 2001