Nanosized Pinning Centers in YBCO Bulk Superconductors with Complex Alloying

The influence of Sm addition on the microstructure and superconducting properties of Y-Ba-Cu-O (YBCO) bulk superconductors has been studied. Precursor powders YBa2Cu3O7-δ (Y-123), Y2O3 and CeO2 were enriched with different amounts of SmBa2Cu3Oy (Sm-123) or Sm2O3 powders with the aim to increase critical current density, Jc,by introducing additional pinning centers. YBCO bulk superconductors with SmBa2Cu3Oy (Y123-Sm) or Sm2O3 (Y123-SmO) powder addition were prepared by the optimized top seeded melt growth process in the form of single grains. Microstructure analysis revealed that Sm2O3 addition leads to a higher amount of smaller Y2BaCuO5 (Y-211) particles, what is related to high critical current densities (Jc ~ 7 x 104 A/cm2) of the YBCO samples with Sm2O3 addition in low magnetic fields. The effect of Sm addition in the form of SmBa2Cu3Oy as well as Sm2O3 powder on Y2BaCuO5 particle size, critical temperature, Tc, and critical current density, Jc, is reported.

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New method for introducing nanometer flux pinning centers into single domain YBCO bulk superconductors

Physica C Superconductivity ◽

10.1016/j.physc.2013.03.045 ◽

2013 ◽

Vol 493 ◽

pp. 128-131 ◽

Cited By ~ 19

Author(s):

W.M. Yang ◽

Miao Wang

Keyword(s):

Flux Pinning ◽

Single Domain ◽

New Method ◽

Ybco Bulk ◽

Pinning Centers ◽

Bulk Superconductors

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Effect of seed orientations on the crystallization characteristics and the magnetic levitation properties of single domain YBCO bulk superconductors

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2021.160788 ◽

2021 ◽

pp. 160788

Author(s):

Ting-Ting Wu ◽

Hai-Yan Zhang ◽

Wan-Min Yang ◽

Yan-Lan Cui ◽

Abulizi Abulaiti

Keyword(s):

Magnetic Levitation ◽

Single Domain ◽

Ybco Bulk ◽

Bulk Superconductors

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Observation and Analysis of the Growth Traces of Single-Domain YBCO Bulk Superconductors with c-Axis Parallel to the Top Surface

Advances in Superconductivity XII ◽

10.1007/978-4-431-66877-0_138 ◽

2000 ◽

pp. 464-466

Author(s):

W. M. Yang ◽

L. Zhou ◽

Feng Yong ◽

P. X. Zhang ◽

J. R. Wang ◽

...

Keyword(s):

Single Domain ◽

Ybco Bulk ◽

Bulk Superconductors ◽

Axis Parallel

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The relationship of levitation force between single and multiple YBCO bulk superconductors

Physica C Superconductivity ◽

10.1016/s0921-4534(01)01086-3 ◽

2002 ◽

Vol 371 (3) ◽

pp. 219-223 ◽

Cited By ~ 4

Author(s):

W.M Yang ◽

L Zhou ◽

Y Feng ◽

P.X Zhang ◽

C.P Zhang ◽

...

Keyword(s):

Levitation Force ◽

Ybco Bulk ◽

Bulk Superconductors ◽

Relationship Of ◽

The Relationship

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THE GROWTH TRACE OF SINGLE-DOMAIN YBCO BULK SUPERCONDUCTORS WITH C-AXIS NORMAL TO THE TOP SURFACE

International Journal of Modern Physics B ◽

10.1142/s0217979205028682 ◽

2005 ◽

Vol 19 (01n03) ◽

pp. 411-414

Author(s):

W. M. YANG ◽

X. X. CHAO ◽

B. X. BIN ◽

L. ZHOU ◽

F. YONG ◽

...

Keyword(s):

Simple Model ◽

Growth Mechanism ◽

Bulk Sample ◽

Single Domain ◽

Fish Scale ◽

Ybco Bulk ◽

Bulk Superconductors

The grown cross traces on the top surface of single-domain YBCO bulk sample with c-axis normal to the top surface has been clearly revealed. It is found that there are many fish-scale like YBCO layers, which are well connected each other. The c-axis is normal to the top surface of the sample, which indicates that YBCO crystal starts to grow from the center to the edge along a(or b) axis in all the four regions divided by across traces, and forms a 90° angle when the four regions meet each other, The clear traces observed is just because of the slightly difference in height between adjacent regions. A simple model has been afforded to explain the growth mechanism of single-domain YBCO bulks with c-axis normal to the top surface.

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