Ac loss characteristics of YBCO superconducting tapes fabricated by TFA-MOD technique

Masataka Iwakuma, Masahiro Nigo, Daisuke Inoue, Naoya Miyamoto, Takanobu Kiss, Kazuo Funaki, Yasuhiro Iijima, Takashi Saitoh, Teruo Izumi, Yutaka Yamada, Yuu Shiohara

研究成果: ジャーナルへの寄稿Conference article

4 引用 (Scopus)

抄録

We investigated the ac loss properties of a YBCO superconducting tape fabricated by TFA-MOD technique. The thickness of the YBCO layer is 1.2 μm. A 6-tape stack of 50 mm in length and 10 mm in width was inserted into a saddle-shaped pickup coil. The ac loss was measured at 35-77 K by applying an external ac magnetic field. The magnetic field angle was changed by rotating the sample stack around its longitudinal axis. The effective penetration field, which corresponds to the breaking point of an ac loss curve, decreased with increasing field angle though it was much smaller than that which was estimated for a superconducting slab with the same thickness as the width of a tape. As a result, the ac loss increased monotonically with an increasing field angle against the wide surface for any amplitude. The observed field angular dependence of the ac loss agreed with the theoretically predicted one by using the observed ac losses in perpendicular magnetic field. Anyway the ac loss for a larger amplitude than the effective penetration field was proportional to the critical current density and the projective width of a tape in the direction of the applied magnetic field for any field angle and any temperature as well known. In addition we estimated the magnetic field, B, dependence of the critical current, I c , from the observed magnetization curves. It was shown that zero-field I c appeared to be a linear function of temperature and I c -B characteristics was scaled with zero-field I c . We also discussed a difference in I c -B characteristics and its temperature dependence between TFA-MOD tapes and IBAD-PLD ones.

元の言語英語
ページ(範囲)1276-1283
ページ数8
ジャーナルPhysica C: Superconductivity and its applications
426-431
発行部数II
DOI
出版物ステータス出版済み - 10 7 2005
イベントProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
継続期間: 11 23 200411 25 2004

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Superconducting tapes
tapes
Tapes
Magnetic fields
magnetic fields
critical current
penetration
Ion beam assisted deposition
Pickups
Critical currents
saddles
curves
Pulsed laser deposition
Temperature
Magnetization
slabs
coils
current density
magnetization
temperature dependence

All Science Journal Classification (ASJC) codes

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

これを引用

Ac loss characteristics of YBCO superconducting tapes fabricated by TFA-MOD technique. / Iwakuma, Masataka; Nigo, Masahiro; Inoue, Daisuke; Miyamoto, Naoya; Kiss, Takanobu; Funaki, Kazuo; Iijima, Yasuhiro; Saitoh, Takashi; Izumi, Teruo; Yamada, Yutaka; Shiohara, Yuu.

:: Physica C: Superconductivity and its applications, 巻 426-431, 番号 II, 07.10.2005, p. 1276-1283.

研究成果: ジャーナルへの寄稿Conference article

Iwakuma, M, Nigo, M, Inoue, D, Miyamoto, N, Kiss, T, Funaki, K, Iijima, Y, Saitoh, T, Izumi, T, Yamada, Y & Shiohara, Y 2005, 'Ac loss characteristics of YBCO superconducting tapes fabricated by TFA-MOD technique', Physica C: Superconductivity and its applications, 巻. 426-431, 番号 II, pp. 1276-1283. https://doi.org/10.1016/j.physc.2005.02.144
Iwakuma, Masataka ; Nigo, Masahiro ; Inoue, Daisuke ; Miyamoto, Naoya ; Kiss, Takanobu ; Funaki, Kazuo ; Iijima, Yasuhiro ; Saitoh, Takashi ; Izumi, Teruo ; Yamada, Yutaka ; Shiohara, Yuu. / Ac loss characteristics of YBCO superconducting tapes fabricated by TFA-MOD technique. :: Physica C: Superconductivity and its applications. 2005 ; 巻 426-431, 番号 II. pp. 1276-1283.
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abstract = "We investigated the ac loss properties of a YBCO superconducting tape fabricated by TFA-MOD technique. The thickness of the YBCO layer is 1.2 μm. A 6-tape stack of 50 mm in length and 10 mm in width was inserted into a saddle-shaped pickup coil. The ac loss was measured at 35-77 K by applying an external ac magnetic field. The magnetic field angle was changed by rotating the sample stack around its longitudinal axis. The effective penetration field, which corresponds to the breaking point of an ac loss curve, decreased with increasing field angle though it was much smaller than that which was estimated for a superconducting slab with the same thickness as the width of a tape. As a result, the ac loss increased monotonically with an increasing field angle against the wide surface for any amplitude. The observed field angular dependence of the ac loss agreed with the theoretically predicted one by using the observed ac losses in perpendicular magnetic field. Anyway the ac loss for a larger amplitude than the effective penetration field was proportional to the critical current density and the projective width of a tape in the direction of the applied magnetic field for any field angle and any temperature as well known. In addition we estimated the magnetic field, B, dependence of the critical current, I c , from the observed magnetization curves. It was shown that zero-field I c appeared to be a linear function of temperature and I c -B characteristics was scaled with zero-field I c . We also discussed a difference in I c -B characteristics and its temperature dependence between TFA-MOD tapes and IBAD-PLD ones.",
author = "Masataka Iwakuma and Masahiro Nigo and Daisuke Inoue and Naoya Miyamoto and Takanobu Kiss and Kazuo Funaki and Yasuhiro Iijima and Takashi Saitoh and Teruo Izumi and Yutaka Yamada and Yuu Shiohara",
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AU - Iwakuma, Masataka

AU - Nigo, Masahiro

AU - Inoue, Daisuke

AU - Miyamoto, Naoya

AU - Kiss, Takanobu

AU - Funaki, Kazuo

AU - Iijima, Yasuhiro

AU - Saitoh, Takashi

AU - Izumi, Teruo

AU - Yamada, Yutaka

AU - Shiohara, Yuu

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N2 - We investigated the ac loss properties of a YBCO superconducting tape fabricated by TFA-MOD technique. The thickness of the YBCO layer is 1.2 μm. A 6-tape stack of 50 mm in length and 10 mm in width was inserted into a saddle-shaped pickup coil. The ac loss was measured at 35-77 K by applying an external ac magnetic field. The magnetic field angle was changed by rotating the sample stack around its longitudinal axis. The effective penetration field, which corresponds to the breaking point of an ac loss curve, decreased with increasing field angle though it was much smaller than that which was estimated for a superconducting slab with the same thickness as the width of a tape. As a result, the ac loss increased monotonically with an increasing field angle against the wide surface for any amplitude. The observed field angular dependence of the ac loss agreed with the theoretically predicted one by using the observed ac losses in perpendicular magnetic field. Anyway the ac loss for a larger amplitude than the effective penetration field was proportional to the critical current density and the projective width of a tape in the direction of the applied magnetic field for any field angle and any temperature as well known. In addition we estimated the magnetic field, B, dependence of the critical current, I c , from the observed magnetization curves. It was shown that zero-field I c appeared to be a linear function of temperature and I c -B characteristics was scaled with zero-field I c . We also discussed a difference in I c -B characteristics and its temperature dependence between TFA-MOD tapes and IBAD-PLD ones.

AB - We investigated the ac loss properties of a YBCO superconducting tape fabricated by TFA-MOD technique. The thickness of the YBCO layer is 1.2 μm. A 6-tape stack of 50 mm in length and 10 mm in width was inserted into a saddle-shaped pickup coil. The ac loss was measured at 35-77 K by applying an external ac magnetic field. The magnetic field angle was changed by rotating the sample stack around its longitudinal axis. The effective penetration field, which corresponds to the breaking point of an ac loss curve, decreased with increasing field angle though it was much smaller than that which was estimated for a superconducting slab with the same thickness as the width of a tape. As a result, the ac loss increased monotonically with an increasing field angle against the wide surface for any amplitude. The observed field angular dependence of the ac loss agreed with the theoretically predicted one by using the observed ac losses in perpendicular magnetic field. Anyway the ac loss for a larger amplitude than the effective penetration field was proportional to the critical current density and the projective width of a tape in the direction of the applied magnetic field for any field angle and any temperature as well known. In addition we estimated the magnetic field, B, dependence of the critical current, I c , from the observed magnetization curves. It was shown that zero-field I c appeared to be a linear function of temperature and I c -B characteristics was scaled with zero-field I c . We also discussed a difference in I c -B characteristics and its temperature dependence between TFA-MOD tapes and IBAD-PLD ones.

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