Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/104896
Type: Artigo de periódico
Title: A Study Of The Mechanism Of Suppression Of Superconductivity By Pr 3+ Substitution For Ba2+ In The Ybco(123) System
Author: Gaur S.K.
Singhal R.K.
Garg K.B.
Shripathi T.
Deshpande U.P.
Bittar E.M.
Pagliuso P.G.
Baggio Saitovitch E.M.
Abstract: We present a systematic structural, transport, iodometric, susceptibility and x-ray photoemission study of the Y (Ba1-xPrx) 2Cu3O7-δ system for x ≤ 0.00,0.025,0.05,0.075 and 0.10 with Pr3+ (smaller in ionic radii but higher in valence than Ba2+) substituted at the Ba site. It is successfully shown that a higher valence cation can be substituted for a lower valence one. The rate of the Tc depression in these is observed to be much higher than that in the case when Pr3+ is substituted at the Y3+ site. This is explained as being due to a composite effect of the depletion of itinerant holes due to the progressive depletion of the oxygen content in the samples, the Pr 4f-O 2p hybridization and change in the in-plane coherence length (ξab) resulting from change in the in-plane atomic distances, using Ginzburg-Landau theory. © IOP Publishing Ltd.
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Rights: fechado
Identifier DOI: 10.1088/0953-8984/19/32/326201
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-34547433188&partnerID=40&md5=bc4385166932dca0f501126b4f348139
Date Issue: 2007
Appears in Collections:Unicamp - Artigos e Outros Documentos

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