| BaCuO_2的添加对YBa_2Cu_3O_(7-δ)临界电流密度的影响 |
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| 引用本文： | 徐胜,吴小山,施国华,顾艳妮.BaCuO_2的添加对YBa_2Cu_3O_(7-δ)临界电流密度的影响[J].低温与超导,2009,37(11). |
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| 作者姓名： | 徐胜 吴小山 施国华 顾艳妮 |
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| 作者单位： | 1. 江苏科技大学张家港校区,张家港,215600
2. 南京大学,南京,210093 |
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| 摘 要： | 掺入BaCuO2杂相的YBa2Cu3O7-δ(YBCO)粉末样品采用固相反应方法制备获得。XRD的Rietveld精修显示BaCuO2杂相和YBCO并存。在YBCO+xBaCuO2(x=0,0.05,0.1,0.2,0.3)的一系列样品中,当x=0.05时,样品的临界电流密度最大。在磁场中,微量BaCuO2杂相的添加,使YBCO的临界电流(Jc)提高了,但超导转变温度(Tc)稍微有所下降。临界电流密度的这些特征行为来自于两方面的共同作用,一方面是超导性的变化,另一方面纳米尺寸范围内的空间分布的非均匀性。
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| 关 键 词： | 掺入BaCuO2杂相的YBa2Cu3O7-δ 临界电流密度 磁通钉杂 磁化 |
Effects of BaCuO_2 addition in YBa_2Cu_3O_(7-δ) on the critical current density |
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| Xu Sheng,Wu Xiaoshan,Shi Guohua,Gu Yangni.Effects of BaCuO_2 addition in YBa_2Cu_3O_(7-δ) on the critical current density[J].Cryogenics and Superconductivity,2009,37(11). |
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| Authors: | Xu Sheng Wu Xiaoshan Shi Guohua Gu Yangni |
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| Institution: | Xu Sheng1,Wu Xiaoshan2,Shi Guohua1,Gu Yangni1(1.Zhangjiagang Campus,Jiangsu University of Science and Technology,Zhangjiagang 215600,China,2.Nanjing University,Nanjing 210093,China) |
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| Abstract: | YBa_2Cu_3O_(7-δ) (YBCO) with BaCuO_2 additives is prepared using the solid reaction method. X-ray diffraction with Rietveld refinement studies show that both BaCuO_2 and YBCO phases are successfully coexisted in the productions. The critical current (J_c) exhibits a maximum at x=0.05 in YBCO+xBaCuO_2(x=0, 0.05, 0.1, 0.2, 0.3) system, and the adding of BaCuO_2 in YBCO enhances J_c under magnetic field. The critical temperature,T_c,decreases slightly with increasing the additives.The characteristic behavior of J_c, may come from the counterbalance of two effects simultaneously caused by the variation of superconductivity and the inhomogeneity of grains distribution in nano-scale. |
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| Keywords: | Critical current density Flux pining Magnetization |
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