Linked Life Data

11385564

Source:http://linkedlifedata.com/resource/pubmed/id/11385564

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6837
pubmed:dateCreated
2001-5-31
pubmed:abstractText
Magnesium diboride, MgB2, has a relatively high superconducting transition temperature, placing it between the families of low- and high-temperature (copper oxide based) superconductors. Supercurrent flow in MgB2 is unhindered by grain boundaries, making it potentially attractive for technological applications in the temperature range 20-30 K. But in the bulk material, the critical current density (Jc) drops rapidly with increasing magnetic field strength. The magnitude and field dependence of the critical current are related to the presence of structural defects that can 'pin' the quantized magnetic vortices that permeate the material, and a lack of natural defects in MgB2 may be responsible for the rapid decline of Jc with increasing field strength. Here we show that modest levels of atomic disorder induced by proton irradiation enhance the pinning of vortices, thereby significantly increasing Jc at high field strengths. We anticipate that either chemical doping or mechanical processing should generate similar levels of disorder, and so achieve performance that is technologically attractive in an economically viable way.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
May
pubmed:issn
0028-0836
pubmed:author
pubmed:issnType
Print
pubmed:day
31
pubmed:volume
411
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
561-3
pubmed:dateRevised
2003-10-31
pubmed:year
2001
pubmed:articleTitle
Enhancement of the high-magnetic-field critical current density of superconducting MgB2 by proton irradiation.
pubmed:affiliation
Centre for High Temperature Superconductivity, Blackett Laboratory, Imperial College, London SW7 2BZ, UK. y.bugoslav@ic.ac.uk
pubmed:publicationType
Journal Article