Delocalization of holes and restitution of superconductivity in Pr substituted at rare earth and Ba site in LnBa(2)Cu(3)O(7) (Ln = Nd, Sm)

Authors
Colonescu, L Cairon, F Berthon, J Zelenay, I Suryanarayanan, R
Citation
L. Colonescu et al., Delocalization of holes and restitution of superconductivity in Pr substituted at rare earth and Ba site in LnBa(2)Cu(3)O(7) (Ln = Nd, Sm), PHYSICA B, 261, 1999, pp. 528-529
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
261
Year of publication
1999
Pages
528 - 529
Database
ISI
SICI code
0921-4526(199901)261:<528:DOHARO>2.0.ZU;2-3
Abstract
Pr substituted at Sm site in SmBa2Cu3O7 did not induce any orthorhombic to tetragonal transition whereas 15% of Pr at Ba site did. Superconductivity w as destroyed with 45% of Pr at Sm site or 15% of Pr at Pa site. However, Sr substitution at Pa site in both the cases restored it. Similar data were o btained in the case of Pr in NdBa2Cu3O7. Our data seem to suggest different mechanisms for hole delocalization operate depending on the site occupatio n of Pr. (C) 1999 Elsevier Science B.V. All rights reserved.