求助英文文献5篇，谢谢。

【序号】：1

【作者】：Alok K. Jha, Neeraj Khare

【题名】：Vortex pinning properties of (Y1-xLax)–Ba–Cu–O and (Y1-xPrx)–Ba–Cu–O superconducting bulks

【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/S0921453409002640

【序号】：2

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

【题名】：Optimization of the properties of codoped single-domain Y–Ba–Cu–O bulk superconductors

【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/S092145341000239X

【序号】：3

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

【题名】：The effect of Ca doping on the properties of melt-processed Gd-based bulk superconductors

【刊名】：Materials Science and Engineering: B

【年、卷、期、起止页码】：2008 89 4

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0921510708001141

【序号】：4

【作者】：Alok K. Jha, Neeraj Khare

【题名】：Chemical (Sr,Co)-doping effect on critical current density for Dy123 melt-solidified bulks

【刊名】：Materials Science and Engineering: B
【年、卷、期、起止页码】：2008 105 672

【全文链接】：http://www.sciencedirect.com/science/article/pii/S0921510708000871

【序号】：5

【作者】：Jun-ichi Shimoyama, Yoshiaki Tazaki, Yui Ishii, Takayoshi Nakashima, Shigeru Horii and Kohji Kishio

【题名】：Effect of Nano-Scale Additions on the Enhancement of Superconductivity in Y-Ba-Cu-O Materials

【刊名】：Journal of Electroceramics

【年、卷、期、起止页码】：2006,25, 1163-1170

【全文链接】：http://link.springer.com/article/10.1007%2Fs10832-004-5204-x?LI=true

谢谢。