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Title: Decreasing superconductivity suppression of Pr in RE:123 compounds by isolating the same from Cu-O conduction band

Abstract

We present the results on structure, superconducting T{sub c}, and magnetic ordering temperature of Pr moments of several Pr substituted rare earth (RE) oxide systems such as Y{sub 1-x}Pr{sub x}BaSrCu{sub 3}O{sub 7} (Y/PrBaSr:123), La{sub 1-x}Pr{sub x}BaCaCu{sub 3}O{sub 7} (La/PrBaCa:123) and Nd{sub 1-x}Pr{sub x}BaCaCu{sub 3}O{sub 7} (Nd/PrBaCa:123). We observe that the suppression of superconductivity due to Pr in all these systems is less in comparison to that in their RE:123 counterparts, i.e., in Pr substituted Y:123, La:123 and Nd:123, respectively. Interestingly with full Pr substitution in RE:123 compounds, the Pr moments order antiferromagnetically at 17K, while in the presently studied three systems, the same happens at around 10K only. Antiferromagnetic ordering temperature of the Pr moments of the end member of the series, which may be taken to be a measure of the strength of the hybridization of Pr-4f orbitals with Cu-O conduction band, appears to have a direct correlation with suppression of superconductivity in the corresponding series. Our results suggest that by various on-site substitutions or by modifying the parent unit cell of Pr:123 compound, one may be able to isolate the Pr-4f magnetic moments or decrease their interaction with the Cu-O conduction band, and achieve superconductivity in the presencemore » of Pr. (c) 1999 American Institute of Physics.« less

Authors:
 [1];  [1];  [2];  [3];  [4]
  1. Instituto de Fisica ''Gleb Wataghin'' UNICAMP, 13083-970, CAMPINAS, SP, (Brazil)
  2. Tata Institute of Fundamental Research, Bombay 400005, (India)
  3. Research Reactor Facility, University of Missouri, Columbia, Missouri 65211 (United States)
  4. National Physical Laboratory, K.S. Krishnan Marg, New Delhi 110012, (India)
Publication Date:
OSTI Identifier:
20216660
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 483; Journal Issue: 1; Other Information: PBD: 1 Sep 1999; Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; RARE EARTH COMPOUNDS; COPPER OXIDES; ELECTRONIC STRUCTURE; CHEMICAL COMPOSITION; CRYSTAL STRUCTURE; ANTIFERROMAGNETISM; EXPERIMENTAL DATA

Citation Formats

Awana, V. P. S., Lima, O. F. de, Malik, S. K., Yelon, W. B., and Narlikar, A. V. Decreasing superconductivity suppression of Pr in RE:123 compounds by isolating the same from Cu-O conduction band. United States: N. p., 1999. Web. doi:10.1063/1.59591.
Awana, V. P. S., Lima, O. F. de, Malik, S. K., Yelon, W. B., & Narlikar, A. V. Decreasing superconductivity suppression of Pr in RE:123 compounds by isolating the same from Cu-O conduction band. United States. doi:10.1063/1.59591.
Awana, V. P. S., Lima, O. F. de, Malik, S. K., Yelon, W. B., and Narlikar, A. V. Wed . "Decreasing superconductivity suppression of Pr in RE:123 compounds by isolating the same from Cu-O conduction band". United States. doi:10.1063/1.59591.
@article{osti_20216660,
title = {Decreasing superconductivity suppression of Pr in RE:123 compounds by isolating the same from Cu-O conduction band},
author = {Awana, V. P. S. and Lima, O. F. de and Malik, S. K. and Yelon, W. B. and Narlikar, A. V.},
abstractNote = {We present the results on structure, superconducting T{sub c}, and magnetic ordering temperature of Pr moments of several Pr substituted rare earth (RE) oxide systems such as Y{sub 1-x}Pr{sub x}BaSrCu{sub 3}O{sub 7} (Y/PrBaSr:123), La{sub 1-x}Pr{sub x}BaCaCu{sub 3}O{sub 7} (La/PrBaCa:123) and Nd{sub 1-x}Pr{sub x}BaCaCu{sub 3}O{sub 7} (Nd/PrBaCa:123). We observe that the suppression of superconductivity due to Pr in all these systems is less in comparison to that in their RE:123 counterparts, i.e., in Pr substituted Y:123, La:123 and Nd:123, respectively. Interestingly with full Pr substitution in RE:123 compounds, the Pr moments order antiferromagnetically at 17K, while in the presently studied three systems, the same happens at around 10K only. Antiferromagnetic ordering temperature of the Pr moments of the end member of the series, which may be taken to be a measure of the strength of the hybridization of Pr-4f orbitals with Cu-O conduction band, appears to have a direct correlation with suppression of superconductivity in the corresponding series. Our results suggest that by various on-site substitutions or by modifying the parent unit cell of Pr:123 compound, one may be able to isolate the Pr-4f magnetic moments or decrease their interaction with the Cu-O conduction band, and achieve superconductivity in the presence of Pr. (c) 1999 American Institute of Physics.},
doi = {10.1063/1.59591},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 483,
place = {United States},
year = {1999},
month = {9}
}