Modification of flux pinning properties of RE-Ba-Cu-O superconductor by fast-neutron and heavy-ion irradiation

Noriko Chikumoto; Marcin Konczykowski; Takayuki Terai; Masato Murakami

doi:10.1088/0953-2048/14/9/305

Modification of flux pinning properties of RE-Ba-Cu-O superconductor by fast-neutron and heavy-ion irradiation

Noriko Chikumoto, Marcin Konczykowski, Takayuki Terai, Masato Murakami

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

RE-Ba-Cu-O bulk samples and single crystals were exposed to fast-neutron and heavy-ion irradiation (HII). The fast-neutron irradiation introduces spherical cascade defects, whereas the HII creates the columnar defects that extend the entire sample. Dc magnetization measurements and magnetic relaxation experiments were performed with a SQUID magnetometer to study the effect of radiation-induced defects on flux pinning properties. In both cases, we observed an enhancement of critical current and a decrease of magnetic relaxation. However, there was a large difference in the observed J_c-B and F_p-B relations, which can be explained in terms of the difference in the defect structure and density.

Original language	English
Pages (from-to)	663-665
Number of pages	3
Journal	Superconductor Science and Technology
Volume	14
Issue number	9
DOIs	https://doi.org/10.1088/0953-2048/14/9/305
Publication status	Published - 2001 Sep 1
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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abstract = "RE-Ba-Cu-O bulk samples and single crystals were exposed to fast-neutron and heavy-ion irradiation (HII). The fast-neutron irradiation introduces spherical cascade defects, whereas the HII creates the columnar defects that extend the entire sample. Dc magnetization measurements and magnetic relaxation experiments were performed with a SQUID magnetometer to study the effect of radiation-induced defects on flux pinning properties. In both cases, we observed an enhancement of critical current and a decrease of magnetic relaxation. However, there was a large difference in the observed Jc-B and Fp-B relations, which can be explained in terms of the difference in the defect structure and density.",

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AU - Chikumoto, Noriko

AU - Konczykowski, Marcin

AU - Terai, Takayuki

AU - Murakami, Masato

PY - 2001/9/1

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AB - RE-Ba-Cu-O bulk samples and single crystals were exposed to fast-neutron and heavy-ion irradiation (HII). The fast-neutron irradiation introduces spherical cascade defects, whereas the HII creates the columnar defects that extend the entire sample. Dc magnetization measurements and magnetic relaxation experiments were performed with a SQUID magnetometer to study the effect of radiation-induced defects on flux pinning properties. In both cases, we observed an enhancement of critical current and a decrease of magnetic relaxation. However, there was a large difference in the observed Jc-B and Fp-B relations, which can be explained in terms of the difference in the defect structure and density.

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Modification of flux pinning properties of RE-Ba-Cu-O superconductor by fast-neutron and heavy-ion irradiation

Abstract

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