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Pinning characteristics in multifilamentary niobium-titanium superconducting wires with submicrometre filaments introduced artificial pinning centres.

Author(s) : MIURA O., MATSUMOTO K., TANAKA Y., YAMAFUJI K., HARADA N., IWAKUMA M., FUNAKI K., MATSUSHITA T.

Type of article: Article

Summary

Multifilamentary niobium-titanium superconducting wires for alternating-current use were developed by introducing ultrafine niobium island-type artificial pinning centres. The maximum critical current density value obtained for wire with a filament diameter of 0.4 micrometer reached at 1 and at 3 T, more than twice the values for conventional wires for alternating-current use. For these wires, the constants of the scaling rule for global pinning force, indicate that the pinning characteristics of the present wires were shifted to the oversaturation-type by the introduction of artificial pinning centres. As a result, the global pinning force at low and medium magnetic fields can be explained fairly well by the direct summation model which is available only for strong pins. A helpful guideline in designing critical current density values for alternating-current wires is also discussed.

Details

  • Original title: Pinning characteristics in multifilamentary niobium-titanium superconducting wires with submicrometre filaments introduced artificial pinning centres.
  • Record ID : 1994-0034
  • Languages: English
  • Source: Cryogenics - vol. 32 - n. 3
  • Publication date: 1992

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