Extrinsic Two-Dimensional Flux Pinning Centers in MgB2 Superconductors Induced by Graphene-Coated Boron

2019 ◽  
Vol 11 (11) ◽  
pp. 10818-10828 ◽  
Author(s):  
Wenxian Li ◽  
Jixiang Kang ◽  
Yang Liu ◽  
Mingyuan Zhu ◽  
Ying Li ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Two Dimensional ◽  
Pinning Centers ◽  
Mgb2 Superconductors

The stability of dislocation networks under various oxygen-doping conditions in superconducting Bi2Sr2CaCu2Oy single crystals and their influence on the flux pinning properties

1994 ◽  
Vol 52 ◽  
pp. 802-803
Author(s):  
Y. Feng ◽  
X. Y. Cai ◽  
R. J. Kelley ◽  
D. C. Larbalestier
Keyword(s):  
Single Crystals ◽  
Oxygen Content ◽  
Basal Plane ◽  
Flux Pinning ◽  
Pinning Centers ◽  
Before And After ◽  
Anomalous Peak ◽  
Basal Plane Dislocation ◽  
The Stability ◽  
Further Development

The issue of strong flux pinning is crucial to the further development of high critical current density Bi-Sr-Ca-Cu-O (BSCCO) superconductors in conductor-like applications, yet the pinning mechanisms are still much debated. Anomalous peaks in the M-H (magnetization vs. magnetic field) loops are commonly observed in Bi2Sr2CaCu2Oy (Bi-2212) single crystals. Oxygen vacancies may be effective flux pinning centers in BSCCO, as has been found in YBCO. However, it has also been proposed that basal-plane dislocation networks also act as effective pinning centers. Yang et al. proposed that the characteristic scale of the basal-plane dislocation networksmay strongly depend on oxygen content and the anomalous peak in the M-H loop at ˜20-30K may be due tothe flux pinning of decoupled two-dimensional pancake vortices by the dislocation networks. In light of this, we have performed an insitu observation on the dislocation networks precisely at the same region before and after annealing in air, vacuumand oxygen, in order to verify whether the dislocation networks change with varying oxygen content Inall cases, we have not found any noticeable changes in dislocation structure, regardless of the drastic changes in Tc and the anomalous magnetization. Therefore, it does not appear that the anomalous peak in the M-H loops is controlled by the basal-plane dislocation networks.

Flux Pinning Characteristics of Artificial Pinning Centers With Different Dimension

2009 ◽  
Vol 19 (3) ◽  
pp. 3248-3253 ◽  
Author(s):  
K. Matsumoto ◽  
P. Mele ◽  
A. Ichinose ◽  
M. Mukaida ◽  
Y. Yoshida ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Pinning Centers ◽  
Artificial Pinning Centers

Engineered flux-pinning centers in Bi2Sr2CaCu2Ox and TIBa2Ca2Cu3Ox superconductors

1995 ◽  
Vol 24 (12) ◽  
pp. 1961-1966 ◽  
Author(s):  
K. C. Goretta ◽  
V. R. Todt ◽  
D. J. Miller ◽  
M. T. Lanagan ◽  
Y. L. Chen ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Pinning Centers

Study of Growth Process for YBa2Cu3Oy Coated Conductors With BaZrO 3 Flux Pinning Centers by Monitoring Electrical Conductivity

2018 ◽  
Vol 28 (4) ◽  
pp. 1-5 ◽  
Author(s):  
Ryo Teranishi ◽  
Kazuki Konya ◽  
Masayoshi Inoue ◽  
Yukio Sato ◽  
Kenji Kaneko ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Flux Pinning ◽  
Growth Process ◽  
Coated Conductors ◽  
Pinning Centers

Temporal Evolution of Grain Size Distributions in Two-Dimensional Pinned Cells

2004 ◽  
Vol 467-470 ◽  
pp. 1003-1008
Author(s):  
C.H. Wörner ◽  
A. Olguín
Keyword(s):  
Grain Size ◽  
Grain Growth ◽  
Experimental Approach ◽  
Temporal Evolution ◽  
Size Distributions ◽  
Two Dimensional ◽  
Pinning Centers ◽  
Grain Size Distributions ◽  
Polycrystalline Aggregates

The distribution of sizes for grain growth in presence of pinning centers (Zener pinned growth) is communicated at different times. The experimental approach uses the well-known similitude between growth in polycrystalline aggregates and cellular soap froths. Two-dimensional results are communicated with grain growth limited by a set of randomly distributed rounded pins.

Artificial 2D Flux Pinning Centers in MgB2 Induced by Graphitic-Carbon Nitride Coated on Boron for Superconductor Applications

2019 ◽  
Vol 2 (9) ◽  
pp. 5399-5408 ◽  
Author(s):  
Wenxian Li ◽  
Jiancheng Li ◽  
Yang Liu ◽  
Jiangtao Qu ◽  
Bin Liu ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Pinning Centers

Flux Pinning Characteristics of ${\rm Sm}_{1+x}{\rm Ba}_{2-x}{\rm Cu}_{3}{\rm O}_{y}$ Films With the Additional $c$-Axis Correlated Pinning Centers

2009 ◽  
Vol 19 (3) ◽  
pp. 3507-3510 ◽  
Author(s):  
T. Ozaki ◽  
Y. Yoshida ◽  
Y. Ichino ◽  
T. Harada ◽  
Y. Takai ◽  
...  
Keyword(s):  
Flux Pinning ◽  
Pinning Centers
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