抄録
YBa2Cu3O7 crystals fabricated by a quench and melt growth process contain fine Y2BaCuO5 particles. These fine precipitates are considered to have three beneficial effects: they suppress crack formation; they promote oxygen diffusion; and they act as pinning centres. Such crystals exhibit larger flux pinning than single crystals and their magnetic behaviour can be understood in terms of the critical state model which has been developed for conventional type II superconductors. Both transport and magnetization measurements gave Jc values exceeding 30 000 A cm-2 at 77 K and 1 T. Flux creep rate is also much smaller than that of single crystals and a value of pinning energy, U, comparable to that of conventional superconductors was obtained. A theoretical estimation of the contribution of 211 precipitates to flux pinning is also presented.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 390-396 |
| ページ数 | 7 |
| ジャーナル | Cryogenics |
| 巻 | 30 |
| 発行部数 | 5 |
| DOI | |
| 出版物ステータス | Published - 1990 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
これを引用
Critical currents and flux creep in melt processed high Tc oxide superconductors. / Murakami, Masato; Gotoh, S.; Koshizuka, N.; Tanaka, S.; Matsushita, T.; Kambe, S.; Kitazawa, K.
：: Cryogenics, 巻 30, 番号 5, 1990, p. 390-396.研究成果: Article
}
TY - JOUR
T1 - Critical currents and flux creep in melt processed high Tc oxide superconductors
AU - Murakami, Masato
AU - Gotoh, S.
AU - Koshizuka, N.
AU - Tanaka, S.
AU - Matsushita, T.
AU - Kambe, S.
AU - Kitazawa, K.
PY - 1990
Y1 - 1990
N2 - YBa2Cu3O7 crystals fabricated by a quench and melt growth process contain fine Y2BaCuO5 particles. These fine precipitates are considered to have three beneficial effects: they suppress crack formation; they promote oxygen diffusion; and they act as pinning centres. Such crystals exhibit larger flux pinning than single crystals and their magnetic behaviour can be understood in terms of the critical state model which has been developed for conventional type II superconductors. Both transport and magnetization measurements gave Jc values exceeding 30 000 A cm-2 at 77 K and 1 T. Flux creep rate is also much smaller than that of single crystals and a value of pinning energy, U, comparable to that of conventional superconductors was obtained. A theoretical estimation of the contribution of 211 precipitates to flux pinning is also presented.
AB - YBa2Cu3O7 crystals fabricated by a quench and melt growth process contain fine Y2BaCuO5 particles. These fine precipitates are considered to have three beneficial effects: they suppress crack formation; they promote oxygen diffusion; and they act as pinning centres. Such crystals exhibit larger flux pinning than single crystals and their magnetic behaviour can be understood in terms of the critical state model which has been developed for conventional type II superconductors. Both transport and magnetization measurements gave Jc values exceeding 30 000 A cm-2 at 77 K and 1 T. Flux creep rate is also much smaller than that of single crystals and a value of pinning energy, U, comparable to that of conventional superconductors was obtained. A theoretical estimation of the contribution of 211 precipitates to flux pinning is also presented.
KW - critical currents
KW - critical state model
KW - flux creep
KW - flux pinning
KW - superconductors
UR - http://www.scopus.com/inward/record.url?scp=0025432474&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0025432474&partnerID=8YFLogxK
U2 - 10.1016/0011-2275(90)90164-8
DO - 10.1016/0011-2275(90)90164-8
M3 - Article
AN - SCOPUS:0025432474
VL - 30
SP - 390
EP - 396
JO - Cryogenics
JF - Cryogenics
SN - 0011-2275
IS - 5
ER -