Experimental and theoretical study of transport properties in uniaxially pressed (Bi, Pb)2Sr2Ca2Cu3O10+δ ceramic samples

被引:3
作者
Garcia-Fornaris, I. [2 ]
Mune, P. [1 ]
Suzuki, P. A. [3 ]
Alberteris-Campos, M. [4 ]
Jardim, R. F. [5 ]
Govea-Alcaide, E. [1 ,4 ]
机构
[1] Univ Oriente, Dept Fis, Santiago De Cuba, Cuba
[2] Univ Granma, Dept Ciencias Basicas, Bayamo, Cuba
[3] Univ Sao Paulo, Escola Engn Lorena, BR-12602810 Lorena, SP, Brazil
[4] Univ Sao Paulo, Escola Politecn, Dept Engn Mecan, BR-05508900 Sao Paulo, Brazil
[5] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, SP, Brazil
来源
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2010年 / 470卷 / 04期
基金
巴西圣保罗研究基金会;
关键词
Bi-based cuprates; Granular superconductors; Transport properties; Transport noise; HIGH-TEMPERATURE SUPERCONDUCTORS; CRITICAL-CURRENT-DENSITY; FLUX-TRAPPING MODEL; T-C SUPERCONDUCTORS; POLYCRYSTALLINE SUPERCONDUCTORS; GRAIN-BOUNDARIES; BI1.65PB0.35SR2CA2CU3O10+DELTA; HYSTERESIS; DEPENDENCE; NOISE;
D O I
10.1016/j.physc.2009.12.059
中图分类号
O59 [应用物理学];
学科分类号
摘要
Experimental and theoretical studies on the magnetic field dependence of the electrical resistance R(B-a) and the transport noise (TN) in polycrystalline high-T-c superconductors subjected to different uniaxial compacting pressures were conducted. X-ray diffraction rocking curves were performed in different surfaces of the samples in order to investigated the degree of texture The results indicated an improvement of the degree of texture with increasing the uniaxial compacting pressure In theoretical simulations of the data, the polycrystalline superconductors were described as a series-parallel array of Josephson devices The intergranular magnetic field is described within the framework of the intragranular flux-trapping model and the distribution of the grain-boundary angles is assumed to follow the Rayleigh statistical function The proposed model describes well the experimental magnetoresistance R(B-a) data We have found that the behavior of the R(B-a) curves changes appreciably when different uniaxially compacting pressures are applied to the sample and such a changes are reproduced by the model when different grain-boundary angles distributions are used In addition, changes in the R(B-a) dependence have their counterparts in the experimental transport noise signals (C) 2009 Elsevier B.V. All rights reserved
引用
收藏
页码:269 / 276
页数:8
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