Doping of Nb to the Ba and Cu Sites in the Y0.6Gd0.4Ba2Cu3O7-δ

被引：0

作者：

Yilmaz, M. ^{[1
]}

Sonmez, E. ^{[2
,3
]}

Dogan, O. ^{[1
]}

机构：

[1] Selcuk Univ, A Kelesoglu Educ Fac, Dept Phys, TR-42099 Meram Konya, Turkey

[2] Ataturk Univ, KK Educ Fac, Dept Phys, TR-25240 Yakutiye Erzurum, Turkey

[3] Ataturk Univ, Grad Sch Nat & Appl Sci, Dept Nanosci & Nanoengn, Adv Mat Res Lab, TR-25240 Erzurum, Turkey

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2013年 / 171卷 / 1-2期

关键词：

Nb and Gd co-doping to YBCO; (Y; Gd)Ba2Cu3O7; cuprates; SUPERCONDUCTING PROPERTIES; NIOBIUM; GD; YXGD1-XBA2CU3O7-DELTA; SUBSTITUTION; DIFFUSION; RE;

D O I：

10.1007/s10909-012-0820-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline samples of Y0.6Gd0.4Ba2-x Nb (x) Cu3O7-delta and Y0.6Gd0.4Ba2Cu3-x Nb (x) O7-delta with different Nb contents (x=0.025, 0.075, 0.125, 0.175 and 0.225) were prepared using the solid state reaction method. Structural and electrical properties of new compounds were investigated with optical microscope, scanning electron microscopy (SEM), X-ray diffraction (XRD), Four Point Probe (FPP). The results indicated that Nb constituted YBa2NbO6 structure instead of substituting to the Y0.6Gd0.4Ba2Cu3O7-delta structure. YBa2NbO6 structures gathered between grains. Transition temperature did not change significantly, but critical current (J (c)) values decreased with increase of Nb concentration. The underlying reason is that the oxygen concentration of compounds remained unchanged due to Gd; thus, T (c) values did not change significantly.

引用

页码：107 / 119

页数：13

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