DocumentCode :
1477048
Title :
Effect of doping Ba, Y V, Zn and Sn on BSCCO superconducting ceramics
Author :
Mohamed, S.B. ; Halim, S.A. ; Azhan, H.
Author_Institution :
Electrotech. Lab., Tsukuba, Japan
Volume :
11
Issue :
1
fYear :
2001
fDate :
3/1/2001 12:00:00 AM
Firstpage :
2862
Lastpage :
2864
Abstract :
The effect of doping on the superconductivity in Bi2Pb 0.6Sr2Ca2-xRxCu3O δ (R=Ba,Y,V,Zn,Sn) has been investigated by resistivity, ac susceptibility measurements and x-ray diffraction (XRD) analysis. All the dopants were incorporated in the calcium site with x ranging from 0.00 to 0.10. The temperature dependence of electrical resistance and ac susceptibility measurements was studied for these samples. The nature of the temperature dependence of the resistance curves indicates the presence of a superconducting transition between grains coupled by weak links. From the XRD data, it is observed that the volume percentage of the 2223 phase decreases with the increasing doping concentration. The presence of low Tc phase is also visible in the real component (χ\´), of the susceptibility data, while the imaginary component (χ"), shows a shift towards lower temperature in the intergranular coupling peak, Tp, as the dopant concentration increases. All the doping elements do not enhance the T c zero but decreases its value from ~104 K to 88 K, 53 K, 79.6 K, 58 K and 53 K for Ba, Y, V, Zn and Y respectively for x=0.10. Barium doped samples are least affected by compositional variation and the zero resistance values are higher than that of the other doped samples
Keywords :
X-ray diffraction; barium compounds; bismuth compounds; calcium compounds; ceramics; electrical resistivity; high-temperature superconductors; lead compounds; magnetic susceptibility; strontium compounds; superconducting transitions; tin compounds; vanadium compounds; yttrium compounds; zinc compounds; (BiPb)2Sr2(CaBa)2Cu3O; (BiPb)2Sr2(CaSn)2Cu3O; (BiPb)2Sr2(CaV)2Cu3O; (BiPb)2Sr2(CaY)2Cu3O; (BiPb)2Sr2(CaZn)2Cu3O; AC susceptibility; XRD; compositional variation; doping; intergranular coupling peak; resistivity; superconducting ceramics; superconducting transition; temperature dependence; weak links; Barium; Bismuth compounds; Calcium; Doping; Electric resistance; Electrical resistance measurement; Temperature dependence; Tin; X-ray scattering; Zinc;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/77.919659
Filename :
919659
Link To Document :
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