The main objective of the diploma thesis at hand was to measure the dependence of the critical current in melt-textured high-temperature superconductors on the angle between an external magnetic field and the crystallographic ab-plane of the superconductor, which is called transport current anisotropy. To that end, a suitable sample preparation method which includes sputter deposition of silver contacts had to be devised. Contact resistances of the order of 10E-9 Ohm*m 2 between these silver contacts and the superconductor were achieved by this method. The transport current anisotropy of melt-textured YBCO was measured at a temperature of 77 K and magnetic fields of up to 6 T. Anomalous transitions from the superconducting to the dissipative state were observed in some of the measurements and resulted in an unexpected shape of the corresponding anisotropy curves. These transitions were ascribed to the effect of Joule heating in the contact areas, as supported by the experimental data.
en
dc.language
English
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dc.language.iso
en
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Hochtemperatursupraleiter
de
dc.subject
Transportstromanisotropie
de
dc.subject
Transportstrom
de
dc.subject
Anisotropie
de
dc.subject
schmelztexturiert
de
dc.subject
YBCO
de
dc.subject
high-temperature superconductors
en
dc.subject
transport current anisotropy
en
dc.subject
transport current
en
dc.subject
anisotropy
en
dc.subject
melt-textured
en
dc.subject
YBCO
en
dc.title
Transport current anisotropy in melt-textured high-temperature superconductors
en
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Thomas Baumgartner
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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tuw.publication.orgunit
E141 - Atominstitut
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dc.type.qualificationlevel
Diploma
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dc.identifier.libraryid
AC07806661
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dc.description.numberOfPages
72
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dc.identifier.urn
urn:nbn:at:at-ubtuw:1-36417
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dc.thesistype
Diplomarbeit
de
dc.thesistype
Diploma Thesis
en
dc.rights.identifier
In Copyright
en
dc.rights.identifier
Urheberrechtsschutz
de
tuw.advisor.staffStatus
staff
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tuw.advisor.orcid
0000-0002-7160-7331
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item.languageiso639-1
en
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item.mimetype
application/pdf
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item.openairecristype
http://purl.org/coar/resource_type/c_bdcc
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item.fulltext
with Fulltext
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item.openairetype
master thesis
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item.grantfulltext
open
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item.openaccessfulltext
Open Access
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item.cerifentitytype
Publications
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crisitem.author.dept
E141-06 - Forschungsbereich Low Temperature Physics and Superconductivity