Abstract
We have systematically studied the role of Nd4Ba2Cu2O10 (Nd422) nonsuperconducting inclusions for flux pinning in oxygen-controlled-melt-growth processed Nd-Ba-Cu-O bulk superconductors. Nd422 inclusions act as interface pinning which is the most dominant in low-field and high-temperature region. In addition, they are also effective in enhancing the critical current density (Jc) even in a high-field region and thus the irreversibility field (Birr). Three pinning regimes have been identified at elevated temperatures (T≥77 K): a combination of point and interface pinning in low fields; a combination of interface and Δκ pinning in intermediate fields; and interface pinning with a slight influence from Δκ pinning in high fields. Nd422 addition shifted the boundary of the pinning regime to higher fields. We have found overall Jc is almost a simple summation of two contributions: interface pinning and Δκ pinning.
| Original language | English |
|---|---|
| Pages (from-to) | 1350-1360 |
| Number of pages | 11 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 62 |
| Issue number | 2 |
| Publication status | Published - 2000 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Flux pinning by Nd4Ba2Cu2O10 inclusions in NdBa2Cu3O7-δ superconductors : A combined effect of point, interface, and Δκ pinning at elevated temperatures. / Mochida, Tadashi; Chikumoto, Noriko; Murakami, Masato.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 62, No. 2, 2000, p. 1350-1360.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Flux pinning by Nd4Ba2Cu2O10 inclusions in NdBa2Cu3O7-δ superconductors
T2 - A combined effect of point, interface, and Δκ pinning at elevated temperatures
AU - Mochida, Tadashi
AU - Chikumoto, Noriko
AU - Murakami, Masato
PY - 2000
Y1 - 2000
N2 - We have systematically studied the role of Nd4Ba2Cu2O10 (Nd422) nonsuperconducting inclusions for flux pinning in oxygen-controlled-melt-growth processed Nd-Ba-Cu-O bulk superconductors. Nd422 inclusions act as interface pinning which is the most dominant in low-field and high-temperature region. In addition, they are also effective in enhancing the critical current density (Jc) even in a high-field region and thus the irreversibility field (Birr). Three pinning regimes have been identified at elevated temperatures (T≥77 K): a combination of point and interface pinning in low fields; a combination of interface and Δκ pinning in intermediate fields; and interface pinning with a slight influence from Δκ pinning in high fields. Nd422 addition shifted the boundary of the pinning regime to higher fields. We have found overall Jc is almost a simple summation of two contributions: interface pinning and Δκ pinning.
AB - We have systematically studied the role of Nd4Ba2Cu2O10 (Nd422) nonsuperconducting inclusions for flux pinning in oxygen-controlled-melt-growth processed Nd-Ba-Cu-O bulk superconductors. Nd422 inclusions act as interface pinning which is the most dominant in low-field and high-temperature region. In addition, they are also effective in enhancing the critical current density (Jc) even in a high-field region and thus the irreversibility field (Birr). Three pinning regimes have been identified at elevated temperatures (T≥77 K): a combination of point and interface pinning in low fields; a combination of interface and Δκ pinning in intermediate fields; and interface pinning with a slight influence from Δκ pinning in high fields. Nd422 addition shifted the boundary of the pinning regime to higher fields. We have found overall Jc is almost a simple summation of two contributions: interface pinning and Δκ pinning.
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M3 - Article
VL - 62
SP - 1350
EP - 1360
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 0163-1829
IS - 2
ER -