抄録
To enhance a global critical current in a superconductor, it is indispensable to understand current limiting factors and their influence on such a critical current. From this point of view, we have investigated in-plane distribution of local critical current density and its electric field criterion in a thin-film superconductor by using scanning-Hall probe microscopy. In a remanent state, after the application of sufficiently high magnetic field to a sample, current flows at critical current density according to the critical state model. Such distribution of current density was estimated from that of measured magnetic field using the Biot-Savart law. Furthermore, the corresponding electric field criterion was evaluated from the relaxation of such remanent magnetic field by considering Faraday's law. This means that we could estimate in-plane distribution of local critical current density as a function of electric field criterion in a nondestructive manner. This characterization method would be very helpful for finding current limiting factors in a thin-film superconductor and their influence on its global current density versus electric field properties which would usually be obtained by four-probe method.
| 元の言語 | 英語 |
|---|---|
| ページ（範囲） | 57-62 |
| ページ数 | 6 |
| ジャーナル | Materials Research Society Symposium Proceedings |
| 巻 | 1434 |
| 発行部数 | January |
| DOI | |
| 出版物ステータス | 出版済み - 1 1 2012 |
| イベント | 2012 MRS Spring Meeting - San Francisco, CA, 米国 継続期間: 4 9 2012 → 4 13 2012 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
これを引用
Estimation of local current transport properties in thin film superconductor based on scanning hall-probe microscopy. / Higashikawa, Kohei; Shiohara, Kei; Inoue, Masayoshi; Kiss, Takanobu; Yoshizumi, Masateru; Izumi, Teruo.
：: Materials Research Society Symposium Proceedings, 巻 1434, 番号 January, 01.01.2012, p. 57-62.研究成果: ジャーナルへの寄稿 › Conference article
}
TY - JOUR
T1 - Estimation of local current transport properties in thin film superconductor based on scanning hall-probe microscopy
AU - Higashikawa, Kohei
AU - Shiohara, Kei
AU - Inoue, Masayoshi
AU - Kiss, Takanobu
AU - Yoshizumi, Masateru
AU - Izumi, Teruo
PY - 2012/1/1
Y1 - 2012/1/1
N2 - To enhance a global critical current in a superconductor, it is indispensable to understand current limiting factors and their influence on such a critical current. From this point of view, we have investigated in-plane distribution of local critical current density and its electric field criterion in a thin-film superconductor by using scanning-Hall probe microscopy. In a remanent state, after the application of sufficiently high magnetic field to a sample, current flows at critical current density according to the critical state model. Such distribution of current density was estimated from that of measured magnetic field using the Biot-Savart law. Furthermore, the corresponding electric field criterion was evaluated from the relaxation of such remanent magnetic field by considering Faraday's law. This means that we could estimate in-plane distribution of local critical current density as a function of electric field criterion in a nondestructive manner. This characterization method would be very helpful for finding current limiting factors in a thin-film superconductor and their influence on its global current density versus electric field properties which would usually be obtained by four-probe method.
AB - To enhance a global critical current in a superconductor, it is indispensable to understand current limiting factors and their influence on such a critical current. From this point of view, we have investigated in-plane distribution of local critical current density and its electric field criterion in a thin-film superconductor by using scanning-Hall probe microscopy. In a remanent state, after the application of sufficiently high magnetic field to a sample, current flows at critical current density according to the critical state model. Such distribution of current density was estimated from that of measured magnetic field using the Biot-Savart law. Furthermore, the corresponding electric field criterion was evaluated from the relaxation of such remanent magnetic field by considering Faraday's law. This means that we could estimate in-plane distribution of local critical current density as a function of electric field criterion in a nondestructive manner. This characterization method would be very helpful for finding current limiting factors in a thin-film superconductor and their influence on its global current density versus electric field properties which would usually be obtained by four-probe method.
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UR - http://www.scopus.com/inward/citedby.url?scp=84939147970&partnerID=8YFLogxK
U2 - 10.1557/opl.2012.1587
DO - 10.1557/opl.2012.1587
M3 - Conference article
VL - 1434
SP - 57
EP - 62
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
SN - 0272-9172
IS - January
ER -