Dramatically Improved Flux Pinning Properties of Heavily Pb-Doped Bi2212 Single Crystals and Ag Composite Tapes

1998 ◽  
pp. 279-284 ◽  
Author(s):  
J. Shimoyama ◽  
Y. Nakamama ◽  
T. Motohashi ◽  
T. Fujita ◽  
T. Yamada ◽  
...  
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Pinning Properties

Effect of Heavy Ion Irradiation on Flux Pinning Properties of Bi2212 and Bi(Pb)2212 Single Crystals Having Various γ 2

1999 ◽  
pp. 465-468 ◽  
Author(s):  
Jun-ichi Shimoyama ◽  
Yuri Nakayama ◽  
Teruki Motohashi ◽  
Kenji Otzschi ◽  
Noriko Chikumoto ◽  
...  
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Ion Irradiation ◽  
Heavy Ion ◽  
Heavy Ion Irradiation ◽  
Pinning Properties

Enhanced flux pinning properties of Bi(Pb)2212 single crystals

2004 ◽  
Vol 408-410 ◽  
pp. 40-41 ◽  
Author(s):  
Masanao Shigemori ◽  
Takehiko Okabe ◽  
Satoshi Uchida ◽  
Takenari Sugioka ◽  
Jun-ichi Shimoyama ◽  
...  
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Pinning Properties

Flux pinning properties of Bi2223 and Hg(Re)1223 single crystals with columnar defects

2002 ◽  
Vol 378-381 ◽  
pp. 457-461 ◽  
Author(s):  
J Shimoyama ◽  
K Shimizu ◽  
S Ueda ◽  
S Horii ◽  
K Otzschi ◽  
...  
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Columnar Defects ◽  
Pinning Properties

Flux pinning properties of NdBa2Cu3O7−d single crystals flux-grown in low oxygen partial pressures

1997 ◽  
Vol 282-287 ◽  
pp. 2137-2138 ◽  
Author(s):  
Takamitsu Higuchi ◽  
Sang-Im Yoo ◽  
Koichiro Waki ◽  
Hiroyuki Fujimoto ◽  
Masato Murakami
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Low Oxygen ◽  
Partial Pressures ◽  
Pinning Properties

Improvement of the flux pinning properties of Hg-based single crystals by a substitution of Ba by Sr and Hg by Pb or Re

2000 ◽  
Vol 341-348 ◽  
pp. 1137-1138 ◽  
Author(s):  
M. Angst ◽  
J. Karpinski ◽  
S. Kazakov ◽  
H. Schwer ◽  
R. Puzniak ◽  
...  
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Pinning Properties

scholarly journals Flux Pinning Properties of 3d Transition Metal-doped Bi(Pb)2212 Single Crystals

2004 ◽  
Vol 39 (4) ◽  
pp. 155-160
Author(s):  
Masanao SHIGEMORI ◽  
Satoshi UCHIDA ◽  
Shigeru HORII ◽  
Jun-ichi SHIMOYAMA ◽  
Kohji KISHIO
Keyword(s):  
Transition Metal ◽  
Single Crystals ◽  
Flux Pinning ◽  
Metal Doped ◽  
Pinning Properties

scholarly journals Dramatically Enhanced Flux Pinning Properties of Cation Composition Controlled Bi(Pb)2212 Single Crystals

2006 ◽  
Vol 43 ◽  
pp. 231-234 ◽  
Author(s):  
Satoshi Uchida ◽  
Jun-ichi Shimoyama ◽  
Takanori Makise ◽  
Shigeru Horii ◽  
Kohji Kishio
Keyword(s):  
Single Crystals ◽  
Flux Pinning ◽  
Cation Composition ◽  
Pinning Properties

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.

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