Navigation Links
NIST discovers how strain at grain boundaries suppresses high-temperature superconductivity
Date:6/17/2009

Researchers at the National Institute of Standards and Technology (NIST) have discovered that a reduction in mechanical strain at the boundaries of crystal grains can significantly improve the performance of high-temperature superconductors (HTS). Their results* could lead to lower cost and significantly improved performance of superconductors in a wide variety of applications, such as power transmission, power grid reliability and advanced physics research.

One of the main challenges in developing long-length, high-quality HTS wires is to mitigate the effect of granularity on wire performance because grain boundaries are prone to block current flow. Dislocationsdefects in the crystalline structurethat grow in number with increasing grain-boundary angle strongly reduce the superconducting crosssection of the grain boundary.

Switching to thin-film designs has led to great improvements in grain alignment and significantly improved performance in, for instance, yttrium-barium-copper-oxide (YBCO) coated conductors. But even in these highly aligned superconductor films grain boundaries still limit their performance. The effect of dislocations can further be mitigated by chemical doping of the grain boundariesfor instance by replacing some of the yttrium atoms with calciumbut it has been difficult to apply this technique to long wire lengths.

Although it is well known that dislocations cause part of the grain boundary crosssection to become non-superconducting, the effect of strainwhich extends from the dislocations into the remaining superconducting bridges over the grain boundarywas previously unknown. NISTs Danko van der Laan and his collaborators have found that this strain plays a key role in reducing current flow over grain boundaries in YBCO. Furthermore, when the strain was removed by applying compression to the grain boundaries, the superconducting properties improved dramatically.

The new understanding of the effects of strain on current flow in thin-film superconductors could significantly advance the development of these materials for practical applications and could lower their cost. Some of the most promising uses are in more efficient electrical transmission lines, which already have been successfully demonstrated by U.S. power companies, and increased electric power grid reliability. NIST has research programs in both these areas. Improved HTS thin-film conductors could also enable more powerful high-field particle accelerators and advanced cancer treatment facilities.


'/>"/>

Contact: James Burrus
jburrus@boulder.nist.gov
303-497-4789
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology technology :

1. Biologist discovers pink-winged moth in Chiricahua Mountains
2. TauTaTis Discovers Potent Inhibitor of Parkinsons Disease Gene Activity
3. deCODE Discovers First Genetic Variant Conferring Increased Risk of Essential Tremor
4. deCODE Discovers Common Genetic Variations Contributing to Low Bone Mineral Density and Risk of Osteoporosis
5. deCODE Discovers Fourth Major Set of Common Genetic Variants Linked to Risk of Estrogen Receptor-Positive Breast Cancer
6. deCODE Discovers Gene Variants that May Help to Distribute the Work of Evolution between Men and Women
7. Medical Breakthrough ... Doctor Discovers Penetrating Carrier That Eradicates Fungus
8. Medicago succesfully expresses VLP antigen for A H1N1 strain
9. Medicago initiates work on Swine Flu strain
10. NOVAVAX Announces Publication of a Preclinical Study Demonstrating that a Virus-like Particle Vaccine Provided Protection Against Highly Pathogenic H1N1 and H5N1 Influenza Strains
11. Seasonal Influenza Activity Increasing Across Europe - H3N2 Dominant Strain
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
NIST discovers how strain at grain boundaries suppresses high-temperature superconductivity
(Date:6/23/2016)... YORK , June, 23, 2016  The Biodesign ... to envision new ways to harness living systems and ... Modern Art (MoMA) in New York City ... than 130 participating students, showcased projects at MoMA,s Celeste ... Paola Antonelli , MoMA,s senior curator of architecture ...
(Date:6/23/2016)... ... ... STACS DNA Inc., the sample tracking software company, today announced that Dr. ... STACS DNA as a Field Application Specialist. , “I am thrilled that Dr. ... STACS DNA. “In further expanding our capacity as a scientific integrator, Hays brings a ...
(Date:6/23/2016)... , June 23, 2016  Blueprint Bio, a ... discoveries to the medical community, has closed its Series ... Matthew Nunez . "We have received a ... the capital we need to meet our current goals," ... provide us the runway to complete validation on the ...
(Date:6/23/2016)... ... June 23, 2016 , ... ... at the Pennsylvania Convention Center and will showcase its product’s latest features from ... also be presenting a scientific poster on Disrupting Clinical Trials in The Cloud ...
Breaking Biology Technology:
(Date:6/2/2016)... The Department of Transport Management (DOTM) ... million US Dollar project, for the , Supply ... Enrolment, and IT Infrastructure , to ... implementation of Identity Management Solutions. Numerous renowned international vendors participated ... was selected for the most compliant and innovative ...
(Date:5/20/2016)... 20, 2016  VoiceIt is excited to announce ... By working together, VoiceIt and VoicePass ... and VoicePass take slightly different approaches to voice ... security and usability. ... new partnership. "This marketing and technology ...
(Date:4/28/2016)... and BANGALORE, India , April 28, ... Systems, a product subsidiary of Infosys (NYSE: INFY ... announced a global partnership that will provide end ... use mobile banking and payment services.      (Logo: ... key innovation area for financial services, but it also plays ...
Breaking Biology News(10 mins):