Characterization of superconducting (Tl,Bi)Sr2CaCu2Oy

被引：8
|
作者：
Wahlbeck, PG [1 ]
Peterson, DE [1 ]
Willis, JO [1 ]
Peterson, EJ [1 ]
Coulter, JY [1 ]
Phillips, DS [1 ]
Salazar, KV [1 ]
机构：
[1] WICHITA STATE UNIV,DEPT CHEM,WICHITA,KS 67260
来源：
PHYSICA C | 1996年 / 256卷 / 3-4期
关键词：
D O I：
10.1016/0921-4534(95)00490-4
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The superconducting phase with mixed Tl and Bi, namely (Tl0.55Bi0.45)Sr2CaCu2Oy, was synthesized and characterized. Synthesis conditions were studied, and this phase, (Tl,Bi)-1212, was found to form preferentially to (Tl,Bi)-1223 when Sr was present with no Ba present. X-ray powder diffraction with Rietveld refinement provided structural data. The phase is tetragonal with a = 3.7988(4) Angstrom and c = 12.076(1) Angstrom, with space group symmetry P4/mmm, and with a platelet crystal morphology. Magnetic-susceptibility data gave an onset of superconductivity T-c at 94.9 +/- 1.3 K with a T-cmid of 86.0 +/- 1.1 K. Magnetic-hysteresis measurements showed that substantial flux pinning occurs in this phase at high temperatures.
引用
收藏
页码：358 / 364
页数：7
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