AC loss properties of laser-scribed multi-filamentary GdBCO coated conductors with artificial pinning centres

Takuya Hayashia, Sosuke Nakamura, Masataka Iwakuma, Kazuo Funaki, Akira Ibi, Yutaka Yamada, Teruo Izumi, Yuh Shiohara, Takashi Saitoh, Yasuhiro Iijima

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)


RE1Ba2Cu3O7-∂ (RE: Rare Earth, Gd, Y and so on) coated conductors have a large aspect ratio and also anisotropy in critical current density. For practical application of REBCO tapes, we evaluated JC and ac loss properties in a wide range of temperature and magnetic field. The induced ac losses due to the perpendicular magnetic field to a tape face are considerably huge. Therefore, in case that REBCO coated conductors are applied electric power machines and devices, ac loss induced in the windings should amount to a great part of the total heat load. We proposed an ac loss reduction method, which is combined with a laser scribing technique and a special winding process into a multifilamentary structure. Additionally, we are trying to enhance critical current density JC, by doping artificial pinning centre. In this study we investigated the ac loss properties of multi-filament structural GdBCO tapes with BZO nanolods as artificial pinning centers. We measured ac losses of 5, 10, 20-filament GdBCO tapes by using a saddle-shaped pickup coil. Consequently we confirmed the ac loss decreased in inverse proportion to the number of filaments even in the GdBCO tapes with enhanced JC by introducing artificial pinning centers.

Original languageEnglish
Pages (from-to)1522-1527
Number of pages6
JournalPhysics Procedia
Publication statusPublished - 2012
Externally publishedYes
EventSuperconductivity Centennial Conference, SCC 2011 - The Hague, Netherlands
Duration: Sept 18 2011Sept 23 2011

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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