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

Magnetic forces of a cylinder shape bulk high-temperature superconductor (HTS) over a permanent magnet guideway (PMG) are studied mathematically. One cylindrical bulk HTS with a diameter of 30 mm and 15 mm in height is used. Two types of PMG are employed for external magnetic fields consideration. The relationship of magnetic forces of bulk HTS under different lateral offsets over PMG is studied with 3D-model finite element method (FEM). The calculation results show that the maximum magnetic levitation force of bulk HTS over PMG is tightly related to the applied magnetic field distribution. For the symmetrical PMG, the maximum magnetic levitation force decreases linearly with the increase of lateral offset of the bulk sample. For the Halbach PMG, when lateral offset changes from 0 mm to 25 mm, the maximum magnetic levitation force increases with the increase of lateral offset of the bulk HTS. When the lateral offset exceeds the center of the Halbach by 25 mm, the maximum levitation force decreases rapidly with the increase of the lateral offset of the bulk sample.

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The effect of magnet configurations on the levitation force of melt processed YBCO bulk superconductors

Physica C Superconductivity ◽

10.1016/s0921-4534(01)00014-4 ◽

2001 ◽

Vol 354 (1-4) ◽

pp. 5-12 ◽

Cited By ~ 15

Author(s):

W.M. Yang ◽

L. Zhou ◽

Y. Feng ◽

P.X. Zhang ◽

J.R. Wang ◽

...

Keyword(s):

Levitation Force ◽

Ybco Bulk ◽

Bulk Superconductors

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Effect of Na-dopant on the Levitation Force of Single Domain YBCO Bulk Superconductors Fabricated by TSMTG Process

Journal of Superconductivity and Novel Magnetism ◽

10.1007/s10948-011-1183-8 ◽

2011 ◽

Vol 24 (8) ◽

pp. 2211-2214 ◽

Cited By ~ 1

Author(s):

W. M. Yang ◽

Y. L. Tang ◽

G. Z. Li ◽

X. X. Chao ◽

J. Ma

Keyword(s):

Levitation Force ◽

Single Domain ◽

Ybco Bulk ◽

Bulk Superconductors

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Influence of ZnO doping on the properties of single domain YBCO bulks fabricated by RE+011 TSIG process

International Journal of Modern Physics B ◽

10.1142/s0217979217450187 ◽

2017 ◽

Vol 31 (25) ◽

pp. 1745018

Author(s):

W. M. Yang ◽

X. C. Yuan ◽

Y. X. Guo

Keyword(s):

Lattice Distortion ◽

Levitation Force ◽

Solid Phase ◽

Single Domain ◽

Pinning Force ◽

Ybco Bulk ◽

Trapped Field ◽

Bulk Superconductors ◽

Flux Pinning Force ◽

Zno Doping

Single domain YBCO bulk superconductors with different additions of ZnO have been successfully fabricated by RE[Formula: see text]011 TSIG process with a new solid phase of [(100-[Formula: see text])(Y2O[Formula: see text]BaCuO2)+[Formula: see text]ZnO] and a new liquid phase of (Y2O3+6CuO+10BaCuO2). The effects of ZnO additions on the growth morphology, microstructure, critical temperature ([Formula: see text]), the levitation force and trapped field of the YBCO bulks have been investigated. It is found that within the range of ZnO additions [Formula: see text]=0–1.0 wt.%, all the samples are of the typical characteristic of single-domain YBCO bulk; the [Formula: see text] of the samples decreases from 92 K to 80 K when the ZnO addition [Formula: see text] increases from [Formula: see text]=0 wt.% to [Formula: see text]=1.0 wt.%; the levitation force and trapped field of the samples firstly increase and then decrease with increase of ZnO additions after going through a maximum, which is closely related with the ZnO addition and the resulting flux pinning force caused by lattice distortion due to the substitution of Zn[Formula: see text] for Cu[Formula: see text] site in the YBCO crystal; the largest levitation force 36.8 N (77 K, 0.5 T) and trapped field 0.416 T (77 K, 0.5 T) of the samples are obtained when [Formula: see text]=0.1 wt.%, respectively. This result is significantly important and helpful for us to improve the properties of YBCO bulk superconductors.

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