Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique

Hiroaki Morita; Kazuo Watanabe; Yoshitake Murakami; Yosuke Koyanagi; Koshichi Noto; Hiroyasu Fujimori; Yoshio Muto

doi:10.1143/JJAP.28.L628

Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique

Hiroaki Morita, Kazuo Watanabe, Yoshitake Murakami, Yosuke Koyanagi, Koshichi Noto, Hiroyasu Fujimori, Yoshio Muto

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

13 Citations (Scopus)

Abstract

A considerably large transport critical current density J_c (1.2ȕ10⁵ A/cm² at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large J_c, the hysteresisof J_c against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grainboundaries in the thin films improved superconducting properties. The hysteresis of J_cwas discussed on the basis of the weak link model.

Original language	English
Pages (from-to)	L628-L630
Journal	Japanese journal of applied physics
Volume	28
Issue number	4 A
DOIs	https://doi.org/10.1143/JJAP.28.L628
Publication status	Published - 1989 Apr
Externally published	Yes

Keywords

Ba-Y-Cu-O, transport critical current density
Film
Hysteresis
Oxide superconductor
Rf sputtering

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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10.1143/JJAP.28.L628

Cite this

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title = "Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique",

abstract = "A considerably large transport critical current density Jc (1.2ȕ105 A/cm2 at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large Jc, the hysteresisof Jc against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grainboundaries in the thin films improved superconducting properties. The hysteresis of Jcwas discussed on the basis of the weak link model.",

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author = "Hiroaki Morita and Kazuo Watanabe and Yoshitake Murakami and Yosuke Koyanagi and Koshichi Noto and Hiroyasu Fujimori and Yoshio Muto",

year = "1989",

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T1 - Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique

AU - Morita, Hiroaki

AU - Watanabe, Kazuo

AU - Murakami, Yoshitake

AU - Koyanagi, Yosuke

AU - Noto, Koshichi

AU - Fujimori, Hiroyasu

AU - Muto, Yoshio

PY - 1989/4

Y1 - 1989/4

N2 - A considerably large transport critical current density Jc (1.2ȕ105 A/cm2 at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large Jc, the hysteresisof Jc against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grainboundaries in the thin films improved superconducting properties. The hysteresis of Jcwas discussed on the basis of the weak link model.

AB - A considerably large transport critical current density Jc (1.2ȕ105 A/cm2 at 4.2 K and 15 T) was observed for the superconducting Ba-Y-Cu-O thin films prepared by an rf sputtering method. In association with such a large Jc, the hysteresisof Jc against the applied magnetic field was smaller compared to that in bulk samples prepared by a solid phase reaction method. It was considered that a fairly smooth morphology of grainboundaries in the thin films improved superconducting properties. The hysteresis of Jcwas discussed on the basis of the weak link model.

KW - Ba-Y-Cu-O, transport critical current density

KW - Film

KW - Hysteresis

KW - Oxide superconductor

KW - Rf sputtering

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DO - 10.1143/JJAP.28.L628

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JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes

SN - 0021-4922

IS - 4 A

ER -

Critical current density and its hysteresis in magnetic field for Ba-Y-Cu-O films prepared by a sputtering technique

Abstract

Keywords

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