Abstract
We have fabricated the ternary (Nd, Eu, Gd)Ba2Cu3Oy system with various Nd:Eu:Gd ratios with the aim of optimizing the pinning performance at 77 K. The magnetization measurements suggest that the three elements (Nd, Eu, Gd) contribute to pinning in different manners: Nd mainly enhances flux pinning at low magnetic fields, Eu controls the second peak position and the irreversibility field, while Gd slightly enhances intermediate and high-field Jc values. The scaling analysis of the pinning force density versus the reduced field h = Ha/Hirr showed a peak at h = 0.55. This value is higher than the theoretically predicted highest value of h = 0.5, corresponding to ΔTc pinning. We proved that an excellent flux pinning can be achieved in the entire magnetic field range when sub-micron secondary phase particles are dispersed in the NEG-123 matrix with an optimum Nd:Eu:Gd ratio.
| Original language | English |
|---|---|
| Pages (from-to) | 688-693 |
| Number of pages | 6 |
| Journal | Superconductor Science and Technology |
| Volume | 15 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2002 May |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
Cite this
Matrix chemical ratio and its optimization for highest flux pinning in ternary (Nd-Eu-Gd)Ba2Cu3Oy. / Miryala, Muralidhar; Jirsa, M.; Sakai, Naomichi; Murakami, Masato.
In: Superconductor Science and Technology, Vol. 15, No. 5, 05.2002, p. 688-693.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Matrix chemical ratio and its optimization for highest flux pinning in ternary (Nd-Eu-Gd)Ba2Cu3Oy
AU - Miryala, Muralidhar
AU - Jirsa, M.
AU - Sakai, Naomichi
AU - Murakami, Masato
PY - 2002/5
Y1 - 2002/5
N2 - We have fabricated the ternary (Nd, Eu, Gd)Ba2Cu3Oy system with various Nd:Eu:Gd ratios with the aim of optimizing the pinning performance at 77 K. The magnetization measurements suggest that the three elements (Nd, Eu, Gd) contribute to pinning in different manners: Nd mainly enhances flux pinning at low magnetic fields, Eu controls the second peak position and the irreversibility field, while Gd slightly enhances intermediate and high-field Jc values. The scaling analysis of the pinning force density versus the reduced field h = Ha/Hirr showed a peak at h = 0.55. This value is higher than the theoretically predicted highest value of h = 0.5, corresponding to ΔTc pinning. We proved that an excellent flux pinning can be achieved in the entire magnetic field range when sub-micron secondary phase particles are dispersed in the NEG-123 matrix with an optimum Nd:Eu:Gd ratio.
AB - We have fabricated the ternary (Nd, Eu, Gd)Ba2Cu3Oy system with various Nd:Eu:Gd ratios with the aim of optimizing the pinning performance at 77 K. The magnetization measurements suggest that the three elements (Nd, Eu, Gd) contribute to pinning in different manners: Nd mainly enhances flux pinning at low magnetic fields, Eu controls the second peak position and the irreversibility field, while Gd slightly enhances intermediate and high-field Jc values. The scaling analysis of the pinning force density versus the reduced field h = Ha/Hirr showed a peak at h = 0.55. This value is higher than the theoretically predicted highest value of h = 0.5, corresponding to ΔTc pinning. We proved that an excellent flux pinning can be achieved in the entire magnetic field range when sub-micron secondary phase particles are dispersed in the NEG-123 matrix with an optimum Nd:Eu:Gd ratio.
UR - http://www.scopus.com/inward/record.url?scp=0036567360&partnerID=8YFLogxK
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U2 - 10.1088/0953-2048/15/5/310
DO - 10.1088/0953-2048/15/5/310
M3 - Article
AN - SCOPUS:0036567360
VL - 15
SP - 688
EP - 693
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 5
ER -