Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

S. Nariki; N. Sakai; I. Hirabayashi; M. Yoshikawa; Y. Itoh; T. Nakamura; H. Utumi

doi:10.1016/j.physc.2008.05.256

Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

S. Nariki, N. Sakai, I. Hirabayashi, M. Yoshikawa, Y. Itoh, T. Nakamura, H. Utumi

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

5 Citations (Scopus)

Abstract

We have investigated the fabrication and the superconducting and field trapping properties of large melt-textured Eu-Ba-Cu-O bulk superconductors for the purpose of application as a compact NMR magnet. We successfully fabricated c-axis oriented single-grain bulk samples up to 65 mm in diameter by melt-processing under a low oxygen partial pressure. The samples of 33 and 47 mm diameters could trap magnetic fields of 1.4 and 1.7 T at 77 K, respectively. The position dependence of T_c in the sample of 33mm diameter is very small throughout the sample. In 65 mm-sized sample, however, T_c and J_c lowered in inner region of the sample, leading to lowering of maximum trapped field. Trapped magnetic field was improved with keeping for long time at maximum temperature in melt-processing.

Original language	English
Pages (from-to)	1451-1455
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	468
Issue number	15-20
DOIs	https://doi.org/10.1016/j.physc.2008.05.256
Publication status	Published - 2008 Sept 15
Externally published	Yes

Keywords

Eu-Ba-Cu-O
Melt-textured bulk
NMR
Superconducting magnet
Trapped magnetic field

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2008.05.256

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title = "Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application",

abstract = "We have investigated the fabrication and the superconducting and field trapping properties of large melt-textured Eu-Ba-Cu-O bulk superconductors for the purpose of application as a compact NMR magnet. We successfully fabricated c-axis oriented single-grain bulk samples up to 65 mm in diameter by melt-processing under a low oxygen partial pressure. The samples of 33 and 47 mm diameters could trap magnetic fields of 1.4 and 1.7 T at 77 K, respectively. The position dependence of Tc in the sample of 33mm diameter is very small throughout the sample. In 65 mm-sized sample, however, Tc and Jc lowered in inner region of the sample, leading to lowering of maximum trapped field. Trapped magnetic field was improved with keeping for long time at maximum temperature in melt-processing.",

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author = "S. Nariki and N. Sakai and I. Hirabayashi and M. Yoshikawa and Y. Itoh and T. Nakamura and H. Utumi",

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T1 - Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

AU - Nariki, S.

AU - Sakai, N.

AU - Hirabayashi, I.

AU - Yoshikawa, M.

AU - Itoh, Y.

AU - Nakamura, T.

AU - Utumi, H.

PY - 2008/9/15

Y1 - 2008/9/15

N2 - We have investigated the fabrication and the superconducting and field trapping properties of large melt-textured Eu-Ba-Cu-O bulk superconductors for the purpose of application as a compact NMR magnet. We successfully fabricated c-axis oriented single-grain bulk samples up to 65 mm in diameter by melt-processing under a low oxygen partial pressure. The samples of 33 and 47 mm diameters could trap magnetic fields of 1.4 and 1.7 T at 77 K, respectively. The position dependence of Tc in the sample of 33mm diameter is very small throughout the sample. In 65 mm-sized sample, however, Tc and Jc lowered in inner region of the sample, leading to lowering of maximum trapped field. Trapped magnetic field was improved with keeping for long time at maximum temperature in melt-processing.

AB - We have investigated the fabrication and the superconducting and field trapping properties of large melt-textured Eu-Ba-Cu-O bulk superconductors for the purpose of application as a compact NMR magnet. We successfully fabricated c-axis oriented single-grain bulk samples up to 65 mm in diameter by melt-processing under a low oxygen partial pressure. The samples of 33 and 47 mm diameters could trap magnetic fields of 1.4 and 1.7 T at 77 K, respectively. The position dependence of Tc in the sample of 33mm diameter is very small throughout the sample. In 65 mm-sized sample, however, Tc and Jc lowered in inner region of the sample, leading to lowering of maximum trapped field. Trapped magnetic field was improved with keeping for long time at maximum temperature in melt-processing.

KW - Eu-Ba-Cu-O

KW - Melt-textured bulk

KW - NMR

KW - Superconducting magnet

KW - Trapped magnetic field

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ER -

Preparation and properties of Eu-Ba-Cu-O superconducting bulk magnets for NMR application

Abstract

Keywords

ASJC Scopus subject areas

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