2004年10月
Preparation of melt-textured YBa2Cu3O7-delta bulk with CeO2 additions and their superconducting properties
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
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- ,
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- 巻
- 412
- 号
- 開始ページ
- 586
- 終了ページ
- 591
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1016/j.physc.2003.12.062
- 出版者・発行元
- ELSEVIER SCIENCE BV
The c-axis oriented YBa2Cu3O7-delta (Y123) bulk superconductors with up to 2.0 Wt.% CeO2 and 18 mm in diameter were prepared by the so-called MMTG process. The critical current density J(C) significantly increased with 1.0 or above Wt.% CeO2 additions. The sample with 2.0 wt.% CeO2 additions exhibited a J(C) of 330,000 A/cm(2) at 35 K and 0 T, when the field was applied parallel to the c-axis of the sample. The maximum of the trapped magnetic field reached 4.2 T at 30 K at the center of the sample surface, which is more than 10 times larger than conventional Nd-Fe-B permanent magnets. Particles of a Ce-Ba compound, whose existence was identified from the observations using a scanning electron microscope, are not distributed uniformly in the Y123 matrix. This high trapped magnetic field of the sample with 2.0 wt.% CeO2 additions can be explained in terms of a more homogeneous distribution of fine Y2BaCuO5 (Y211) particles in the Y123 matrix compared with the CeO2-free sample. (C) 2004 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.physc.2003.12.062
- ISSN : 0921-4534
- Web of Science ID : WOS:000224711400123