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Low Resistivity Contact to Iron-Pnicitide Superconductors

Ames Laboratory

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Technology Marketing Summary

Superconductors are materials which carry electrical current without dissipation. However, feeding electrical current into a superconductor generates heat dissipation in the contacts and degrades maximum attainable current value. The degradation in contacts is also different depending on the different chemical nature of the superconducting materials.

Description

Iron-pnictide based superconductors have a number of superior properties as compared to other known high temperature superconductors and due to their high critical magnetic fields, can be competitive for generating high magnetic fields without loss of resistance. In order to facilitate those properties Iowa State University and Ames Laboratory researchers have discovered a contact material and developed a method for application of the contact material which provides the necessary low electrical resistivity for iron-pcnitide superconductors. The new technology is easily adaptable to current solder methods used for creating electrical contacts and has the advantage of being very economical.

Benefits
  • Effective (provides low contact surface resistivity of 10-9 W.cm2)
  • Economical (utilizes current solder methods with an economical material)
Applications and Industries

Electrical contact material for superconductors based on iron-pnictides.

More Information

M.A.Tanatar, N. Ni, S.L. Bud’ko, P. C. Canfield, and R. Prozorov,
Field-dependent transport critical current in single crystals of Ba(Fe1−xTMx)2As2 (TM = Co, Ni) superconductors
Supercond. Sci. Technol. 23, 054002 (2010).

Samples are available for testing.

Patents and Patent Applications
ID Number
Title and Abstract
Primary Lab
Date
Patent 8,450,246
Patent
8,450,246
Low resistivity contact to iron-pnictide superconductors
Method of making a low resistivity electrical connection between an electrical conductor and an iron pnictide superconductor involves connecting the electrical conductor and superconductor using a tin or tin-based material therebetween, such as using a tin or tin-based solder. The superconductor can be based on doped AFe.sub.2As.sub.2, where A can be Ca, Sr, Ba, Eu or combinations thereof for purposes of illustration only.
05/28/2013
Issued
Technology Status
Technology IDDevelopment StageAvailabilityPublishedLast Updated
3707DevelopmentAvailable09/09/201110/21/2014

Contact AMES About This Technology

To: Stacy Joiner<joiner@ameslab.gov>