Magnetic field orientation dependence of flux pinning in (Gd,Y)Ba2Cu3O7−x coated conductor with tilted lattice and nanostructures

Zhang, Y.; Specht, E. D.; Cantoni, Claudia; Christen, D. K.; Thompson, James R.; Sinclair, John; Goyal, A.; Zuev, Yuri L.; Aytuğ, Tolga; Paranthaman, M.; Chen, Y.; Selvamanickam, V.

doi:10.1016/j.physc.2009.08.007

Cited by 22 publications

(27 citation statements)

References 37 publications

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“…At high fields, on the other hand, a perfect overlap of the L and T track over the entire angular range is found. A qualitative difference between of L and T tracks at low seems to be an inherent feature of the MOCVD/IBAD process, which has also been observed in a GdYBCO tape produced by this technique [16].…”

Section: B Fields Swept Out-of-planesupporting

confidence: 55%

Critical Current Densities of MOCVD Tapes for Different Current Directions

Weigand

Rutter

Sahonta

et al. 2011

IEEE Trans. Appl. Supercond.

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The critical current density of an MOCVD/IBAD coated conductor was measured on tracks patterned longitudinally (L) and transversely (T) to the tape direction. Despite the samples' vicinality no dependence of on track direction was found for magnetic fields applied perpendicular to the film plane. In angular out-of-plane measurements the previously reported asymmetry due to tilted precipitate planes was observed in an L track, whereas curves from a T track were almost perfectly symmetric with similarly high absolute values of . At low fields the effects of surface pinning were seen. Our results show that in most scenarios the current carrying capability is equally as good parallel and perpendicular to the tape direction, which is highly relevant for ROEBEL cables. In measurements where the magnetic field was swept in the film plane the anisotropy was found to be significantly higher than for MOD/RABiTS samples, which we explain by the different morphology of grain boundaries in the tapes. At low temperatures of a T track exhibited a clear signature of vortex channeling.

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Section: B Fields Swept Out-of-planesupporting

confidence: 55%

Critical Current Densities of MOCVD Tapes for Different Current Directions

Weigand

Rutter

Sahonta

et al. 2011

IEEE Trans. Appl. Supercond.

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“…This is supported by: (i) the angular dependence is described by an elliptical function [equations (6), (7)] and (ii) the experimental anisotropy factor, u=5.5, is close to the mass anisotropy of YBCO, 5.3 [46,47]. The deviation of the ab peak from the ab direction is because of the tilt in the ab planes [34,35]. Moreover, close to the ab directions the vortex should deform, resulting in a complicated 3D pinning scenario [47].…”

Section: Formula For the Anisotropic Magnetic-field Dependence Of J Cmentioning

confidence: 78%

AC loss in ReBCO pancake coils and stacks of them: modelling and measurement

Pardo¹,

Šouc²,

Kováč³

2012

Supercond. Sci. Technol.

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Many applications of ReBCO coated conductors contain stacks of pancake coils. In order to reduce their high AC loss, it is necessary to understand the loss mechanisms. In this article, we measure and simulate the AC loss and the critical current, Ic, in stacks of pancake coils ("pancakes"). We construct stacks of up to 4 pancakes and we measure them by electrical means. We also obtain the anisotropic field dependence of Jc from Ic measurements of the tape. This Jc is the only input to the simulations, together with the coil dimensions. After validating our computations with the measurements, we simulate stacks of many pancakes, up to 32. We found that the AC loss in a stack of (four) pancakes is very high, two orders of magnitude larger than for a single tape. A double pancake behaves as a single one with double width but a stack of more pancakes is very different. Finally, we found that a 2-strand Roebel cable reduces the AC loss in a stack of pancakes but not in a single pancake. In conclusion, our simulations are useful to predict the ac loss of stacks of coated conductor pancake coils and to reduce the ac loss by optimizing the coil design.

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“…15 The most effective way to enhance flux pinning in YBCO films is to organize a network of self-assembled BaZrO 3 ͑BZO͒ nanodots and nanorods usually aligned along the YBCO c-axis. 8,9,23 Unfortunately, the optimization of these materials are usually made within a relatively narrow temperature and magnetic field range, although it is clearly demonstrated that many interesting phenomena are expected to occur in high magnetic fields. [17][18][19] Similar types of nanodots and nanoscale columnar defects were afterwards obtained, also in other matrices such as NdBa 2 Cu 3 O 7−␦ and ErBa 2 Cu 3 O 7−␦ .…”

Section: Influence Of Bazro 3 Dopant Concentration On Properties Of Ymentioning

confidence: 99%

Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T

Huhtinen

Irjala

Paturi

et al. 2010

Journal of Applied Physics

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Articles you may be interested inBroad temperature range study of Jc and Hirr anisotropy in YBa2Cu3Ox thin films containing either Y2O3 nanoparticles or stacking faults Appl. Phys. Lett. 106, 052603 (2015); 10.1063/1.4907891 Strongly enhanced vortex pinning from 4 to 77 K in magnetic fields up to 31 T in 15 mol.% Zr-added (Gd, Y)-Ba-Cu-O superconducting tapes APL Mat. 2, 046111 (2014); 10.1063/1.4872060The effects of strain, current, and magnetic field on superconductivity in Pr0.5Ca0.5MnO3/YBa2Cu3O7/Pr0.5Ca0.5MnO3 trilayer

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Magnetic field orientation dependence of flux pinning in (Gd,Y)Ba2Cu3O7−x coated conductor with tilted lattice and nanostructures

Cited by 22 publications

References 37 publications

Critical Current Densities of MOCVD Tapes for Different Current Directions

Critical Current Densities of MOCVD Tapes for Different Current Directions

AC loss in ReBCO pancake coils and stacks of them: modelling and measurement

Influence of BaZrO3 dopant concentration on properties of YBa2Cu3O6+x films in magnetic fields up to 30 T

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