E-J characteristics and n value of melt-textured REBa2Cu3Ox; (RE: Nd, Y)

Kazuo Inoue; Naomichi Sakai; Masato Murakami

doi:10.1109/TASC.2003.812116

E-J characteristics and n value of melt-textured REBa₂Cu₃O_x; (RE: Nd, Y)

Kazuo Inoue, Naomichi Sakai, Masato Murakami

Department of Materials Science and Engineering

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

Melt-textured NdBa₂Cu₃O_x, (Ndl23) exhibits the secondary peak effect on the magnetic field dependence of the critical current density (J_c), which is attributed to the field-induced pinning. The electric field (E)-the current density (J) characteristics will be affected by the field-induced pinning. With the aim of clarifying this effect, we have investigated the E-J characteristics for melt-textured Nd123 with the secondary peak and Yba₂Cu₃O_x (Y123) with smaller secondary peak through dc magnetization and ac susceptibility. The n value was estimated on the assumption that E follows the power law: E = E_c(J/J_c)ⁿ. The n value was about 30 at 77 K for Y123. In the case of Nd123, the peak structure was observed on the magnetic field dependence of the n value, which exceeded 60 at 77 K. This suggests that the n value is increased by the field-induced pinning.

Original language	English
Pages (from-to)	3109-3112
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	13
Issue number	2 III
DOIs	https://doi.org/10.1109/TASC.2003.812116
Publication status	Published - 2003 Jun 1
Event	2002 Applied Superconductivity Conference - Houston, TX, United States Duration: 2002 Aug 4 → 2002 Aug 9

Keywords

E-J characteristics
Field-induced pinning
N value
Nd123
Secondary peak

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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title = "E-J characteristics and n value of melt-textured REBa2Cu3Ox; (RE: Nd, Y)",

abstract = "Melt-textured NdBa2Cu3Ox, (Ndl23) exhibits the secondary peak effect on the magnetic field dependence of the critical current density (Jc), which is attributed to the field-induced pinning. The electric field (E)-the current density (J) characteristics will be affected by the field-induced pinning. With the aim of clarifying this effect, we have investigated the E-J characteristics for melt-textured Nd123 with the secondary peak and Yba2Cu3Ox (Y123) with smaller secondary peak through dc magnetization and ac susceptibility. The n value was estimated on the assumption that E follows the power law: E = Ec(J/Jc)n. The n value was about 30 at 77 K for Y123. In the case of Nd123, the peak structure was observed on the magnetic field dependence of the n value, which exceeded 60 at 77 K. This suggests that the n value is increased by the field-induced pinning.",

keywords = "E-J characteristics, Field-induced pinning, N value, Nd123, Secondary peak",

author = "Kazuo Inoue and Naomichi Sakai and Masato Murakami",

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T2 - 2002 Applied Superconductivity Conference

AU - Inoue, Kazuo

AU - Sakai, Naomichi

AU - Murakami, Masato

PY - 2003/6/1

Y1 - 2003/6/1

N2 - Melt-textured NdBa2Cu3Ox, (Ndl23) exhibits the secondary peak effect on the magnetic field dependence of the critical current density (Jc), which is attributed to the field-induced pinning. The electric field (E)-the current density (J) characteristics will be affected by the field-induced pinning. With the aim of clarifying this effect, we have investigated the E-J characteristics for melt-textured Nd123 with the secondary peak and Yba2Cu3Ox (Y123) with smaller secondary peak through dc magnetization and ac susceptibility. The n value was estimated on the assumption that E follows the power law: E = Ec(J/Jc)n. The n value was about 30 at 77 K for Y123. In the case of Nd123, the peak structure was observed on the magnetic field dependence of the n value, which exceeded 60 at 77 K. This suggests that the n value is increased by the field-induced pinning.

AB - Melt-textured NdBa2Cu3Ox, (Ndl23) exhibits the secondary peak effect on the magnetic field dependence of the critical current density (Jc), which is attributed to the field-induced pinning. The electric field (E)-the current density (J) characteristics will be affected by the field-induced pinning. With the aim of clarifying this effect, we have investigated the E-J characteristics for melt-textured Nd123 with the secondary peak and Yba2Cu3Ox (Y123) with smaller secondary peak through dc magnetization and ac susceptibility. The n value was estimated on the assumption that E follows the power law: E = Ec(J/Jc)n. The n value was about 30 at 77 K for Y123. In the case of Nd123, the peak structure was observed on the magnetic field dependence of the n value, which exceeded 60 at 77 K. This suggests that the n value is increased by the field-induced pinning.

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