Cargando…
Pinning Mechanisms in YBCO Tapes
In this thesis work, a study on flux pinning mechanisms of commercial YBCO tapes is presented. This study has been performed via critical current characterization using transport (via direct I-V curves) and magnetization (via a Vibrating Sample Magnetometer) measurements. The latter one...
Autor principal: | |
---|---|
Formato: | info:eu-repo/semantics/article |
Lenguaje: | eng |
Publicado: |
Politecnico di Milano
2015
|
Materias: | |
Acceso en línea: | http://cds.cern.ch/record/2104459 |
_version_ | 1780948786091130880 |
---|---|
author | Spera, Marcello |
author_facet | Spera, Marcello |
author_sort | Spera, Marcello |
collection | CERN |
description | In this thesis work, a study on flux pinning mechanisms of commercial YBCO tapes is presented. This study has been performed via critical current characterization using transport (via direct I-V curves) and magnetization (via a Vibrating Sample Magnetometer) measurements. The latter ones turned out to be better concerning the comprehension of the pinning landscape of the provided samples, as a wider range of magnetic fields and temperatures is available for those measurements in the setup I used. The comparison of the experimental data with existing theoretical models allowed me to draw a picture of the pinning mechanisms underlying in each sample, and they turned out to be quite different one another.
Moreover, for high-performance research tapes, another interesting feature has been found: the counterplay between the self-field critical current and the in-field one. Very well engineered artificial pinning structures limit the self-field critical current density due to the high density of defects, while samples with high degree of cristallinity have their in-field performances limited due to the poor pinning properties. |
format | info:eu-repo/semantics/article |
id | cern-2104459 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2015 |
publisher | Politecnico di Milano |
record_format | invenio |
spelling | cern-21044592019-09-30T06:29:59Z http://cds.cern.ch/record/2104459 eng Spera, Marcello Pinning Mechanisms in YBCO Tapes Accelerators and Storage Rings 1: Management and Communication (MANCOM) 1.3: Scientific publications and monographs In this thesis work, a study on flux pinning mechanisms of commercial YBCO tapes is presented. This study has been performed via critical current characterization using transport (via direct I-V curves) and magnetization (via a Vibrating Sample Magnetometer) measurements. The latter ones turned out to be better concerning the comprehension of the pinning landscape of the provided samples, as a wider range of magnetic fields and temperatures is available for those measurements in the setup I used. The comparison of the experimental data with existing theoretical models allowed me to draw a picture of the pinning mechanisms underlying in each sample, and they turned out to be quite different one another. Moreover, for high-performance research tapes, another interesting feature has been found: the counterplay between the self-field critical current and the in-field one. Very well engineered artificial pinning structures limit the self-field critical current density due to the high density of defects, while samples with high degree of cristallinity have their in-field performances limited due to the poor pinning properties. Politecnico di Milano info:eu-repo/grantAgreement/EC/FP7/312453 info:eu-repo/semantics/openAccess Education Level info:eu-repo/semantics/article http://cds.cern.ch/record/2104459 2015 |
spellingShingle | Accelerators and Storage Rings 1: Management and Communication (MANCOM) 1.3: Scientific publications and monographs Spera, Marcello Pinning Mechanisms in YBCO Tapes |
title | Pinning Mechanisms in YBCO Tapes |
title_full | Pinning Mechanisms in YBCO Tapes |
title_fullStr | Pinning Mechanisms in YBCO Tapes |
title_full_unstemmed | Pinning Mechanisms in YBCO Tapes |
title_short | Pinning Mechanisms in YBCO Tapes |
title_sort | pinning mechanisms in ybco tapes |
topic | Accelerators and Storage Rings 1: Management and Communication (MANCOM) 1.3: Scientific publications and monographs |
url | http://cds.cern.ch/record/2104459 http://cds.cern.ch/record/2104459 |
work_keys_str_mv | AT speramarcello pinningmechanismsinybcotapes |