Very high trapped fields in neutron irradiated and reinforced YBa2Cu3O7−δ melt-textured superconductors

González-Arrabal, R.; Eisterer, M.; Weber, H. W.; Fuchs, G.; Verges, P.; Krabbes, G.

doi:10.1063/1.1497705

Cited by 21 publications

(12 citation statements)

References 15 publications

(9 reference statements)

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“…J c decreases monotonically with field. This is strikingly similar to the changes found in single crystalline 20,44 and melt textured 45,46 cuprate superconductors and indicates that pinning in the unirradiated sample is between weak (ordered flux line lattice) and strong (disordered flux line lattice) pinning. Thus, an orderdisorder transition takes place at intermediate fields which leads to the second peak (or fishtail effect) in the magnetization curve 22,47,48,49,50 .…”

Section: Resultssupporting

confidence: 79%

Neutron Irradiation of Sm-1111

Eisterer,

Weber,

Jiang

et al. 2009

Preprint

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SmFeAsO 1−x F x was irradiated in a fission reactor to a fast (E > 0.1 MeV) neutron fluence of 4 × 10 21 m −2 . The introduced defects increase the normal state resistivity due to a reduction in the mean free path of the charge carriers. This leads to an enhancement of the upper critical field at low temperatures. The critical current density within the grains, J c , increases upon irradiation.The second maximum in the field dependence of J c disappears and the critical current density becomes a monotonically decreasing function of the applied magnetic field.

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Section: Resultssupporting

confidence: 79%

Neutron Irradiation of Sm-1111

Eisterer,

Weber,

Jiang

et al. 2009

Preprint

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“…Neutron irradiation of the YBCO sample Np-11 showed an enhancement of the maximal trapped fields, as already often represented before in the literature [12,13]. At an activation field of µ 0 H = 2.5 T, the maximal trapped field B T,max increases from 0.983 to 1.343 T, i.e.…”

Section: Neutron Irradiation Of Superconducting Monolithssupporting

confidence: 77%

Hall probe mapping and neutron irradiation of batch processed top-seeded melt-textured YBCO

Haindl¹,

Weber²,

Litzkendorf³

et al. 2005

Supercond. Sci. Technol.

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The suitability of Hall probe mapping for non-destructive experimental characterizations of YBa 2 Cu 3 O 7−δ bulk superconductors is discussed. Firstly, the flux penetration pattern, observed by Hall scans of the trapped field after activation in magnetic fields below the complete penetration field in the zero-field cooled (zfc) mode, provides valuable information on the homogeneity of the material. Secondly, the magnetoscan technique is presented, which was also applied to irradiated samples. Investigations of samples from the same batch (prior to neutron irradiation) allow us to draw conclusions about the quality of the batch process.

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“…Irradiating YBCO with high-energy particles has been shown to be a very effective way of introducing such nano-scale defects into the superconducting matrix of single crystal [8], thin-film [9] and bulk melt textured samples [10]. Unfortunately, these processes are not cost effective on a large processing scale, required for the practical processing of bulk samples for engineering applications.…”

Section: Introductionmentioning

confidence: 99%

Enhanced magnetic flux pinning in nano-composite (re)-ba-cu-o bulk superconductors

Cardwell¹,

Babu²,

Iida³

2006

Nanopages

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Abstract. Nano-composite (RE)-Ba-Cu-O bulk superconductors containing non-superconducting phase inclusions of composition RE 2 Ba 4 CuMO y (the '2411' phase), where M = W, Nb, Ag and Bi, embedded in the REBa 2 Cu 3 O 7-δ (RE-123) superconducting matrix have been fabricated successfully. The 2411-phase has typical dimensions in the range 10-300 nm and is stable under the substitution of any rare earth element on the Y site for all M elements. The 2411-phase is paramagnetic in nature and is characterized by a double perovskite cubic crystallographic structure. All phases within the (RE)-2411 family are chemically inert within the RE-123 matrix and do not coarsen appreciably at elevated temperatures during processing. Most significantly, the (RE)-2411 phase forms effective flux pinning sites within the superconducting matrix, since their size is comparable to that of the coherence length of RE-Ba-Cu-O. A direct correlation between the RE 2 Ba 4 CuMO y phase inclusions content in the RE-123 matrix and increased magnetic flux pinning has been observed. The flux pinning force and the current densities increase by an order of magnitude for the nano-composites compared to that of bulk, melt processed RE-Ba-Cu-O without inclusions, confirming their potential for improved current carrying performance when processed in the form of bulk, thin-film or coated conductors.

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Very high trapped fields in neutron irradiated and reinforced YBa2Cu3O7−δ melt-textured superconductors

Cited by 21 publications

References 15 publications

Neutron Irradiation of Sm-1111

Neutron Irradiation of Sm-1111

Hall probe mapping and neutron irradiation of batch processed top-seeded melt-textured YBCO

Enhanced magnetic flux pinning in nano-composite (re)-ba-cu-o bulk superconductors

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