US 8,880,135 B2Granted

Low alternating-current loss oxide superconductor and fabricating method thereof

AssigneesRailway Technical Research Institute, International Superconductivity Technology Center, The Juridical Foundation, Kyushu University, National University Corporation

InventorsKenji Suzuki, Saburo Hoshi, Junko Matsuda, Teruo Izumi, Yuh Shiohara, Masataka Iwakuma

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Abstract

The present invention is configured such that, in a low AC loss oxide superconductor constituted by providing an oxide superconducting layer 6 on a substrate 1, said oxide superconducting layer 6 is separated into a plurality of filament conductors 2 in parallel to the lengthwise direction of said substrate 1 by dividing grooves 3 plurally formed in the widthwise direction of said substrate, and a high-resistance oxide 8 is formed in said dividing grooves 3. Because of the invention, it is possible to increase the insulation properties of individually divided mated filament conductors, and to obtain an oxide superconductor that has low AC loss.

Claims7

Dependent claims

A low AC loss oxide superconductor comprising an oxide superconducting layer on a base material, wherein

said oxide superconducting layer is separated into a plurality of filament conductors in parallel to the lengthwise direction of said base material by dividing grooves which are plurally formed in the widthwise direction of said base material, wherein
a high-resistance oxide having an electrical resistivity of 44 Ωcm or more is formed in said dividing grooves,
electrical resistance between adjacent filament conductors via said dividing grooves increases due to said high-resistance oxide formed in said dividing grooves and low AC loss is realized,
said high-resistance oxide is an oxide of molten coagulation which adhered to the inside of said dividing grooves, and
the diving grooves are arranged at an angle greater than or equal to 25° and less than or equal to 45° relative to the normal line of the base material when viewed from front.

2 more elements

Dependencies are inferred from the claim text.