再求英文文献5篇，谢谢。

【序号】：1

【作者】：Alok K. Jha, Neeraj Khare

【题名】：Strongly enhanced pinning force density in YBCO–BaTiO3nanocomposite superconductor

【刊名】：Physica C: Superconductivity

【年、卷、期、起止页码】：65, 224508 (2009)

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0921453409001403

【序号】：2

【作者】：M. Muralidhara, M. Jirsab, M. Tomitaa

【题名】：Flux pinning and superconducting properties of melt-textured NEG-123 superconductor with TiO2 addition

【刊名】： Physica C: Superconductivity

【年、卷、期、起止页码】：390, 143 (2010)

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0921453410004995

【序号】：3

【作者】：Z. Deng, K. Tsuzuki, M. Miki, B. Felder, S. Hara, M. Izumi

【题名】：Trapped field recovery of bulk superconductor magnets by static field magnetization

【刊名】：Physica C: Superconductivity

【年、卷、期、起止页码】：2011 89 4

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0921453411003030

【序号】：4

【作者】：Alok K. Jha, Neeraj Khare

【题名】：Investigation of flux pinning properties of YBCO:BaZrO3composite superconductor from temperature dependent magnetization studies

【刊名】：Journal of Magnetism and Magnetic Materials
【年、卷、期、起止页码】：2010 105 672

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0304885310002246

【序号】：5

【题名】：Improvement of Flux Pinning Properties of RE123 Materials by Chemical Doping

【刊名】：Journal of Physics: Conference Series

【年、卷、期、起止页码】：2006,25, 1163-1170

【全文链接】：http://iopscience.iop.org/1742-6596/43/1/059?v_showaffiliations=yes

谢谢。