抄録
The current flow and the flux pinning properties on struts of superconducting YBa 2 Cu 3 O x foams are analyzed in detail in the temperature range 60 K ≤ T ≤ T c . For this purpose, magnetization loops were measured on foam struts taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, the critical current densities, j c , and the flux pinning forces, F p = j c × B, were calculated and pinning force scaling diagrams F p /F p ,max versus h = H a /H irr were established. The scaling in the temperature range 60 K < T < 90 K was found to be well developed for all samples with peak positions, h 0 , above 0.4, which is an indication of δT c -pinning. The shape of the pinning functions is found to be completely different from all other high-T c materials and varies only slightly with position. This specific dome shape cannot be described by an addition of several pinning functions, and the parameters p and q do not fit to the description of Dew-Hughes. Therefore, we employ Kramer plots to obtainmore information on the flux pinning mechanism.
| 元の言語 | English |
|---|---|
| 記事番号 | 8624451 |
| ジャーナル | IEEE Transactions on Applied Superconductivity |
| 巻 | 29 |
| 発行部数 | 5 |
| DOI | |
| 出版物ステータス | Published - 2019 8 1 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering
これを引用
Current Flow and Flux Pinning Properties of YBCO Foam Struts. / Koblischka, Michael Rudolf; Koblischka-Veneva, Anjela Dimitrova; Berger, Kévin; Nouailhetas, Quentin; Douine, Bruno; Reddy, E. S.; Schmitz, Georg J.
：: IEEE Transactions on Applied Superconductivity, 巻 29, 番号 5, 8624451, 01.08.2019.研究成果: Article
}
TY - JOUR
T1 - Current Flow and Flux Pinning Properties of YBCO Foam Struts
AU - Koblischka, Michael Rudolf
AU - Koblischka-Veneva, Anjela Dimitrova
AU - Berger, Kévin
AU - Nouailhetas, Quentin
AU - Douine, Bruno
AU - Reddy, E. S.
AU - Schmitz, Georg J.
PY - 2019/8/1
Y1 - 2019/8/1
N2 - The current flow and the flux pinning properties on struts of superconducting YBa 2 Cu 3 O x foams are analyzed in detail in the temperature range 60 K ≤ T ≤ T c . For this purpose, magnetization loops were measured on foam struts taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, the critical current densities, j c , and the flux pinning forces, F p = j c × B, were calculated and pinning force scaling diagrams F p /F p ,max versus h = H a /H irr were established. The scaling in the temperature range 60 K < T < 90 K was found to be well developed for all samples with peak positions, h 0 , above 0.4, which is an indication of δT c -pinning. The shape of the pinning functions is found to be completely different from all other high-T c materials and varies only slightly with position. This specific dome shape cannot be described by an addition of several pinning functions, and the parameters p and q do not fit to the description of Dew-Hughes. Therefore, we employ Kramer plots to obtainmore information on the flux pinning mechanism.
AB - The current flow and the flux pinning properties on struts of superconducting YBa 2 Cu 3 O x foams are analyzed in detail in the temperature range 60 K ≤ T ≤ T c . For this purpose, magnetization loops were measured on foam struts taken from various positions of a 5 × 2 × 2 cm 3 large foam sample prepared at RWTH Aachen. From these data, the critical current densities, j c , and the flux pinning forces, F p = j c × B, were calculated and pinning force scaling diagrams F p /F p ,max versus h = H a /H irr were established. The scaling in the temperature range 60 K < T < 90 K was found to be well developed for all samples with peak positions, h 0 , above 0.4, which is an indication of δT c -pinning. The shape of the pinning functions is found to be completely different from all other high-T c materials and varies only slightly with position. This specific dome shape cannot be described by an addition of several pinning functions, and the parameters p and q do not fit to the description of Dew-Hughes. Therefore, we employ Kramer plots to obtainmore information on the flux pinning mechanism.
KW - critical currents
KW - flux pinning
KW - Foam
KW - scaling
KW - YBCO
UR - http://www.scopus.com/inward/record.url?scp=85061635593&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061635593&partnerID=8YFLogxK
U2 - 10.1109/TASC.2019.2894712
DO - 10.1109/TASC.2019.2894712
M3 - Article
AN - SCOPUS:85061635593
VL - 29
JO - IEEE Transactions on Applied Superconductivity
JF - IEEE Transactions on Applied Superconductivity
SN - 1051-8223
IS - 5
M1 - 8624451
ER -