書誌事項
- タイトル別名
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- Introduction of Pinning Centers to Coated Conductors by High-energy Heavy-ion Irradiation and Their Effects on Critical Current Characteristics
- Yケイ テープ センザイ エ ノ コウエネルギージュウ イオン ショウシャ ニ ヨル ピンドメ チュウシン ドウニュウ ト リンカイ デンリュウ ミツド トクセイ
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To enhance the critical current density (Jc) in magnetic fields, we performed heavy-ion irradiation to introduce artificial pinning centers into YBCO—coated conductors. It is well known that high-energy heavy-ion irradiation introduces amorphous tracks along ion trajectories. Since the morphology and the size of the defect depend on the electron stopping power, Se, we used three different irradiation conditions, namely, 400 MeV Kr-ions, 450 MeV Xe-ions, and 500 MeV Au-ions, to study its effect. All of them enhance the in-field Jc, though the largest enhancement was observed after irradiation with 450 MeV Xe-ions. We also studied the dependence of Jc enhancement to optimize irradiation fluence. In all cases, the reduction of Jc was observed when the irradiation fluence exceeded 1 x 1012 ions/cm2, which may be attributed to the reduction of superconducting volume as well as the depression of superconductivity. From the angular dependence of Jc measurement, the columnar defects act as unidirectional pinning sites, as expected, but with a very large trapping angle of approximately 45°.
収録刊行物
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- 低温工学
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低温工学 44 (12), 523-528, 2009
公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
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詳細情報 詳細情報について
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- CRID
- 1390282679589226752
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- NII論文ID
- 10025874655
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- NII書誌ID
- AN00333419
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- COI
- 1:CAS:528:DC%2BC3cXhslSqtLs%3D
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- ISSN
- 18800408
- 03892441
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- NDL書誌ID
- 10550159
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- 使用不可