Open AccessION SIZE EFFECT OF Tc-PLATEAU IN R1-xPrxBa2Cu3O7-δ
Author(s) -
Xun Cao,
Yali Tang,
J. C. Ho
Publication year - 1994
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.43.1854
Subject(s) - plateau (mathematics) , ion , superconductivity , radius , materials science , ionic radius , condensed matter physics , physics , mathematical analysis , mathematics , computer security , quantum mechanics , computer science
Dependence of superconducting Tc upon Pr-substitution concentration x was studied systematically in 1-xx237-δ system with R=Nd, Dy, Tm, Yb and Lu. It was found that there is a Tc-plateau in the range of low x as R radius i≤i(Dy). The Pr-concentration width corresponded by Tc-plateau exhibits a R ion size effect. We suggest that the ion size effect of Tc-plateau might result from the change of local state of Pr 4f electron. A critical R radius, ic, is suggested and superconductivity disappears as iic.