Effect of Nb addition on magnetic, structural and superconducting properties of (Bi, Pb)-2223 superconductors

被引:16
作者
Bilgili, O. [1 ]
Kocabas, K. [1 ]
机构
[1] Dokuz Eylul Univ, Dept Phys, TR-35160 Izmir, Turkey
关键词
T-C SUPERCONDUCTORS; WEAK-LINK BEHAVIOR; AC SUSCEPTIBILITY; BI-2223; SUPERCONDUCTORS; SUBSTITUTION; TEMPERATURE;
D O I
10.1007/s10854-014-1956-5
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this work, the effects of Nb2O5 addition with different ratios on the structural and magnetic properties of Bi1.7-xPb0.3NbxSr2Ca2Cu3Oy (x = 0.00-0.20) superconducting samples were investigated. (Bi, Pb)-2223 superconducting samples were prepared by conventional solid-state reaction method. The phase formation, phase fraction and lattice parameters were determined from X-ray powder diffraction (XRD) measurements, the microstructure, surface morphology analyses of the samples were carried out using scanning electron microscope (SEM). Additionally, ac susceptibility measurements were done in order to determine the critical current density (J(c)) and hole concentration (p) of the samples. AC susceptibility measurements were done at various ac fields (ranging from 20 to 160 A/m) to understand the effect of Nb addition on magnetic properties of Bi1.7-xPb0.3NbxSr2Ca2Cu3Oy superconductor. Critical onset (T (c) (on) ) and loss peak temperatures (T-p) were estimated from the ac susceptibility curves. It was observed from ac susceptibility measurements that the critical onset temperatures decreased from about 108-98 K with increasing Nb addition (x = 0.00-0.20). The imaginary part of susceptibility was used to calculate the intergranular critical current density (J(c)) by means of the Bean's model. X-ray diffraction analysis revealed that the samples consisted of a mixture of Bi-2223 and Bi-2212 phases as the major constituents and non-superconducting phase Ca2PbO4 as the minor. It was also shown from XRD measurements that volume fraction of high-T-c phase decreases with increasing Nb addition up to x = 0.20. The sample with Nb addition of x = 0.20 showed the highest volume fraction of Bi-2223 phase (86 %). When Nb addition was increased, the surface morphology and grain connectivity are found to degrade, the grain sizes decrease and porosity of the samples were observed to increase from SEM images except the sample with x = 0.20 Nb addition.
引用
收藏
页码:2889 / 2897
页数:9
相关论文
共 27 条
[1]   Thermal and electrothermal characterization of bismuth based high-Tc superconductors [J].
Anis-ur-Rehman, A. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2009, 469 (1-2) :66-72
[2]   MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS [J].
BEAN, CP .
REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :31-+
[3]   Effects of Li Substitution in Bi-2223 Superconductors [J].
Bilgili, O. ;
Selamet, Y. ;
Kocabas, K. .
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2008, 21 (08) :439-449
[4]   Comparative AC susceptibility analysis on Bi-(Pb)-Sr-Ca-Cu-O high-Tc superconductors [J].
Çelebi, S .
PHYSICA C, 1999, 316 (3-4) :251-256
[5]   Frequency dependence of the intergranular AC loss peak in a high-Tc Bi-(Pb)-Sr-Ca-Cu-O bulk superconductor [J].
Çelebi, S ;
Karaca, I ;
Aksu, E ;
Gencer, A .
PHYSICA C, 1998, 309 (1-2) :131-137
[6]   Effects of Nb2O5 addition on superconducting properties of BSCCO [J].
Ghazanfari, Nader ;
Kilic, Ahmet ;
Gencer, Ali ;
Oezkan, Huesnue .
SOLID STATE COMMUNICATIONS, 2007, 144 (5-6) :210-214
[7]   Effect of Ag2CO3 addition on the morphology and physical properties of Bi-based (2223) high-Tc superconductors [J].
Gul, I. H. ;
Amin, F. ;
Abbasi, A. Z. ;
Anis-ur-Rehman, M. ;
Maqsood, A. .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2006, 449 (02) :139-147
[8]   Effect of vanadium and barium on the Bi-based (2223) superconductors [J].
Gul, IH ;
Rehman, MA ;
Ali, M ;
Maqsood, A .
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2005, 432 (1-2) :71-80
[9]   The Investigation of the Weak Link Behavior in the Niobium (Nb) Doped Bi1.6Pb0.4Sr2Ca2Cu3O δ Superconductor [J].
Jafari, M. ;
Sedghi, H. ;
Esmaeili, A. .
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2013, 26 (12) :3331-3338
[10]   AC susceptibility study of Bi1.66Pb0.34Sr2Ca2-xMgxCu3Oy (x=0, 0.2 and 0.4) superconductor systems [J].
Kameli, P. ;
Salamati, H. ;
Abdolhosseini, I. .
JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 458 (1-2) :61-65