High trapped field performances in thin-wall YBa2Cu3O7−δ bulk cryomagnets

Thin-wall YBa2Cu3O7−δ bulk single domains were grown from drilled preforms with a holes network in the aim of increasing the specific areas and diminishing the oxygen diffusion paths. By applying a progressive annealing at high temperature under oxygen pressure (10 MPa), crack-free superconductors w...

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Bibliographic Details
Published in:Applied physics letters 2013-05, Vol.102 (20)
Main Authors: Kenfaui, Driss, Sibeud, Pierre-Frédéric, Louradour, Eric, Noudem, Jacques G., Chaud, Xavier
Format: Article
Language:English
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Summary:Thin-wall YBa2Cu3O7−δ bulk single domains were grown from drilled preforms with a holes network in the aim of increasing the specific areas and diminishing the oxygen diffusion paths. By applying a progressive annealing at high temperature under oxygen pressure (10 MPa), crack-free superconductors were obtained in a very short time (less than 3 days). A crack-free microstructure fostered large size persistent current loops, which boosted the trapped field performances. A trapped field Bmax = 5.2 T at 17 K was achieved on a 16 mm-diameter thin-wall pellet (disk surface s = 1.987 cm2), which led to a striking trapped field density BmaxS=2.617 T cm−2.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4807722