| YBa2Cu3O7-xc轴方向临界电流的测定 |
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| 引用本文： | 余正,丁世英,颜家烈,任洪涛.YBa2Cu3O7-xc轴方向临界电流的测定[J].物理学报,1991,40(4):634-641. |
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| 作者姓名： | 余正 丁世英 颜家烈 任洪涛 |
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| 作者单位： | (1)北京有色金属研究总院,北京,100088; (2)南京大学物理系,南京,210008 |
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| 摘 要： | 本文测量了熔化织构法生长(MTG)的和通常烧结法制备的YBa2Cu3O7-x块状样品的传输临界电流密度Tc以及磁场-样品不同取向的磁滞回线。MTG样品的Jc在78K和零场时达到3.5×104A/cm2,实验提供了有力的证据表明如此高的Jc主要是由于块状样品内弱连接的消除,因为MTG块状样品的整体Jc与烧结样品颗
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| 关 键 词： | YBaCuO 临界电流 超导体 |
| 收稿时间： | 8/6/1990 12:00:00 AM |
MEASUREMENT OF c-AXIS CRITICAL CURRENT DENSITY FOR YBa2Cu3O7-x |
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| YU ZHENG,DING SHI-YING,YAN JIA-LIE and REN HONG-TAO.MEASUREMENT OF c-AXIS CRITICAL CURRENT DENSITY FOR YBa2Cu3O7-x[J].Acta Physica Sinica,1991,40(4):634-641. |
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| Authors: | YU ZHENG DING SHI-YING YAN JIA-LIE and REN HONG-TAO |
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| Abstract: | Transport critical current density Jc and hysteresis loop at different field-sample orientations were measured for both melt-textured growth (MTG) and sintered YBa2Cu3Oy (YBCO) sample. Very high Jc (78K, 0 Oe) of 3.5×104A/cm2 has been obtained for the MTG YBCO sample. The experimental results show strong evidence of that the high Jc in MTG YBCO results mainly from the significant reduction of weak links because the bulk Jc for MTG sample are almost the same as the intragrain Jc for sintered sample. We also show that the Jc parallel to a-b plane is about an order of magnitude higher than that normal to a-b plane(Jc∥≈10Jc⊥). |
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