CEC-ICMC 2017 - Abstracts, Timetable and Presentations

Session

M1OrB - HTS and MgB2 Bulk I

M1OrB

10 Jul 2017, 09:30

Hall of Ideas - EH

Conveners

M1OrB - HTS and MgB2 Bulk I

• John Durrell (University of Cambridge)
• Michael Susner (U.S. Air Force Research Laboratory)

120. [Invited] A portable superconducting cryo-magnet with magnetic field of > 3 T generated by the pulsed field magnetization

Difan Zhou (University of Cambridge)

10/07/2017, 09:30

Invited Oral Presentation

A cryo-magnet system has been constructed using a single grain GdBa₂Cu₃O_7-δ (GdBaCuO) bulk superconductor of diameter 30 mm. The bulk superconductor was cooled by conductive cooling, employing a portable Stirling cryo-cooler with a base temperature of 51 K. The superconducting cryo-magnet can be repeatedly charged by a pulsed field magnetization (PFM) system...

297. Trapped field property of iron-pnictide bulk magnet

Dr Akiyasu Yamamoto (Tokyo Institute of Technology)

10/07/2017, 10:00

Contributed Oral Presentation

A trapped field of over 1 T at 5 K and 0.5 T at 20 K has been measured between a stack of magnetized cylinders of bulk polycrystalline Ba0.6K0.4Fe2As2 superconductors 10 mm in diameter and 18 mm in combined thickness. The trapped field showed a low magnetic creep rate (~3% after 24 hours at 5 K), while magneto-optical imaging revealed a trapped field distribution corresponding to uniform...

137. Current distribution in field-cooled $YBa_2Cu_3O_7$ and $MgB_2$ disks as deduced from levitation force and trapped field measurements carried out in a large temperature range

Pierre Bernstein (Université de Caen-Normandie)

10/07/2017, 10:15

Contributed Oral Presentation

A classical method used for determining $J_c$, the critical current density in superconducting cylinders consists in measuring the magnetic field along the superconductor axis after field cooling the sample. Supposing that the current generating the trapped field flows in the whole sample, the trapped field is proportional to $J_c$ and the obtained curve can be reproduced with the Chen et al....

48. Large Diameter, Single Grain (RE)BCO Bulk Superconductors Fabricated by Infiltration and Growth

David Cardwell (University of Cambridge)

10/07/2017, 10:30

Contributed Oral Presentation

Large, single grain bulk (RE)BaCuO [(RE)BCO] superconductors have potential to generate magnetic fields that are much greater higher than those produced by conventional permanent magnets. The top seeded melt growth (TSMG) technique has been developed over the last 25 years to fabricate large, [(RE)BCO single grain samples that eliminate current limiting grain boundaries in the bulk...

289. Non-destructive investigation of hybrid of ferromagnet /(RE)BCO large grain bulks by flux extraction magnetometry and levitation force

Prof. Philippe Vanderbemden (University of Liege)

10/07/2017, 10:45

Contributed Oral Presentation

This work deals with bulk, large grain superconductors used as permanent magnet for rotating machines or levitation applications. It has recently been shown that the magnetic properties of bulk large grain superconductors can be improved easily by attaching a short section of a soft ferromagnetic material (F) to one of the faces of the bulk superconductor (S), thereby producing a hybrid F/S...