抄録
Magnetization hysteresis loops (MHL) were measured on two NEG-123 bulk samples with addition of 30% Gd-211 fine (sub-micron) particles in the temperature range 65-88 K. These two samples possessed significantly different second-to-central peak heights ratios. Both sets of the Jc-B curves could be, however, fitted with a high precision by the same combined analytical function Jc(B) = Jcpexp(-αB/Bp) + Jspbp exp[(1 - (B/Bp)n)/n] in all investigated temperatures. The pinning regimes governing formation of the central and second peak could be separated in this way. As far as the central peak contribution to the MHL becomes usually negligible at around Bp, the shape of Jc(B) above Bp is governed by only a high-field pinning mechanism. The central peak extends to this field region only at temperatures very close to Tc. Good scaling of the pinning force density with temperature gives a further support to the above conclusions.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 489-493 |
| ページ数 | 5 |
| ジャーナル | Physica C: Superconductivity and its Applications |
| 巻 | 357-360 |
| 発行部数 | SUPPL. 2 |
| DOI | |
| 出版物ステータス | Published - 2001 8 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
これを引用
Perfect fits of Jc-B dependencies in NEG-123 bulk samples with 30% Gd-211 fine particles. / Jirsa, M.; Miryala, Muralidhar; Murakami, Masato.
：: Physica C: Superconductivity and its Applications, 巻 357-360, 番号 SUPPL. 2, 08.2001, p. 489-493.研究成果: Article
}
TY - JOUR
T1 - Perfect fits of Jc-B dependencies in NEG-123 bulk samples with 30% Gd-211 fine particles
AU - Jirsa, M.
AU - Miryala, Muralidhar
AU - Murakami, Masato
PY - 2001/8
Y1 - 2001/8
N2 - Magnetization hysteresis loops (MHL) were measured on two NEG-123 bulk samples with addition of 30% Gd-211 fine (sub-micron) particles in the temperature range 65-88 K. These two samples possessed significantly different second-to-central peak heights ratios. Both sets of the Jc-B curves could be, however, fitted with a high precision by the same combined analytical function Jc(B) = Jcpexp(-αB/Bp) + Jspbp exp[(1 - (B/Bp)n)/n] in all investigated temperatures. The pinning regimes governing formation of the central and second peak could be separated in this way. As far as the central peak contribution to the MHL becomes usually negligible at around Bp, the shape of Jc(B) above Bp is governed by only a high-field pinning mechanism. The central peak extends to this field region only at temperatures very close to Tc. Good scaling of the pinning force density with temperature gives a further support to the above conclusions.
AB - Magnetization hysteresis loops (MHL) were measured on two NEG-123 bulk samples with addition of 30% Gd-211 fine (sub-micron) particles in the temperature range 65-88 K. These two samples possessed significantly different second-to-central peak heights ratios. Both sets of the Jc-B curves could be, however, fitted with a high precision by the same combined analytical function Jc(B) = Jcpexp(-αB/Bp) + Jspbp exp[(1 - (B/Bp)n)/n] in all investigated temperatures. The pinning regimes governing formation of the central and second peak could be separated in this way. As far as the central peak contribution to the MHL becomes usually negligible at around Bp, the shape of Jc(B) above Bp is governed by only a high-field pinning mechanism. The central peak extends to this field region only at temperatures very close to Tc. Good scaling of the pinning force density with temperature gives a further support to the above conclusions.
KW - (Nd,Eu,Gd)BaCuO
KW - Critical currents
KW - Melt-textured materials
KW - Scaling
KW - Vortex physics
UR - http://www.scopus.com/inward/record.url?scp=0035421645&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035421645&partnerID=8YFLogxK
U2 - 10.1016/S0921-4534(01)00302-1
DO - 10.1016/S0921-4534(01)00302-1
M3 - Article
AN - SCOPUS:0035421645
VL - 357-360
SP - 489
EP - 493
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - SUPPL. 2
ER -