Fluctuation-induced conductivity and phase separation in composite samples (YBa2Cu3O7-δ)1-y-(PrBa2Cu3O7-δ)y

被引：0

作者：

Haas Leandro Monteiro, Joao Frederico ^{[1
]}

Opata, Yuri Aparecido ^{[1
]}

de Leite Gusmao Pinheiro, Lincoln Brum ^{[1
]}

da Silva Leal, Adriane Consuelo ^{[1
]}

Jurelo, Alcione Roberto ^{[1
]}

机构：

[1] Univ Estadual Ponta Grossa, Dept Fis, Ponta Grossa, Brazil

来源：

PHASE TRANSITIONS | 2016年 / 89卷 / 01期

关键词：

high-T-C superconductor; praseodymium; phase transition; critical phenomena; NORMAL-STATE; PR; SUPERCONDUCTIVITY; TEMPERATURE; SUPPRESSION; TRANSITION; BEHAVIOR;

D O I：

10.1080/01411594.2015.1077955

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Fluctuation-induced conductivity in composite samples (YBa2Cu3O7-)(1-y)-(PrBa2Cu3O7-)(y) was investigated. The samples with 0 <= Y <= 0.1 were produced through the solid-state reaction method. Powder X-ray Rietveld analysis for the composites demonstrated that the patterns are identical to that of YBa2Cu3O7-. From the critical exponent analysis, it could be observed that the transport properties of composites are governed by the presence of two phases: YBa2Cu3O7- and PrBa2Cu3O7-. Splitting of the pairing transition was observed and two critical temperatures were identified, but only one is strongly affected by Pr. The composite structure can be thought as a three-dimensional grain percolation system with the structure of Pr-grain and Y-grain unit cell.

引用

页码：21 / 36

页数：16

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