本文系统地研究了Y-123高温超导体Ca掺杂样品Y1-xCaxBa2Cu3O7-δ(x=0,0.1,0.2,0.3)和Y-123/Cax(x=0.1,0.2,0.3)样品的超导特性,对样品的临界温度Tc及输运特性进行了对比分析.实验发现:随着Ca含量增加两组样品的Tc有不同程度的递减,样品Y1-xCaxBa2Cu3O7-δ的Tc随Ca含量增加的变化规律正好与样品Y-123/Cax相反.Ca元素的加入使两组样品临界电流都有明显提高,但在Y-123/Cax中表现得更为明显,并且受磁场的影响更小.实验中还发现,Y1-xCaxBa2Cu3O7-δ的I～V曲线存在负磁阻区,而在Y-123/Cax中却没有发现.
参考文献
| [1] | G Xiao;N S Rebello .[J].Physica C,1993,211:433. |
| [2] | E Suard;A Maignan;V Caignaert;B Raveau .[J].Physica C,1992,200:43. |
| [3] | J T Kucera;J C Bravman .[J].Physical Review B,1995,51:8582. |
| [4] | M Weller .[J].Materials Science Forum,1993,667:667. |
| [5] | G Feusier;Y Mi;R Schaller .[J].Solid State Communications,1994,91:591. |
| [6] | A Manthiram;S J Lee;J B Goodenough .[J].Journal of Solid State Chemistry,1988,73:278. |
| [7] | A Manthiram;J B Goodenough .[J].Physica C,1989,159:760. |
| [8] | G J Baldha;R B Jotania;H H Joshi;H N Pandya and R G Kulkarni .[J].Solid State Communications,1989,71:839. |
| [9] | R B Jotania;S M Joshi;G J Baldha;H H Joshi and R G Kulkarni .[J].Bulletin of Materials Science,1991,14:903. |
| [10] | B Fisher;J Genossar;C G Kuper;L Patlagan,G M Reisner and A Knizhnik .[J].Physical Review B,1993,47:6054. |
| [11] | A Schmehl;B Goetz;R R Schulz;C W Schneider,H Bielefeldt,H Hilgenkamp and J Mannhart .[J].EUROPHYSICS LETTERS,1999,47:110. |
| [12] | H. Hilgenkamp;C. W. Schneider;R. R. Schulz;B. Goetz;A. Schmehl;H. Bielefeldt;J. Mannhart .Modifying electronic properties of interfaces in high-T_c superconductors by doping[J].Physica, C. Superconductivity and its applications,1999(0):7-11. |
| [13] | G A Daniels;A Gurevich;D C Larbalestier .[J].Applied Physics Letters,2000,77:3251. |
| [14] | C L Gledel;J F Marucco;E Vincent;D Favrot,B Poumellec,B Touzelin,M Gupta and H Alloul .[J].Physica C,1991,175:279. |
| [15] | V P S Awana;S K Malik;W B Yelon .[J].Physica C,1996,262:272. |
| [16] | J L Tallon;C Bernhard;H Shaked;R L Hitterman and J D Jorgensen .[J].Physical Review B,1995,51:12911. |
| [17] | R G Buckley;J L Tallon;D M Pooke .[J].Physica C,1990,165:391. |
| [18] | R G Buckley et al.[J].Physica C,1991,174:383. |
| [19] | Y Tokura;J B Torrance;T C Huang;A I Nazzal .[J].Physical Review B,1988,38:7156. |
| [20] | H Hilgenkamp;J Mannhart .[J].Reviews of Modern Physics,2002,74:485. |
| [21] | K Guth;H U Krebs;H C Freyhardt;Ch Jooss .[J].Physical Review B,2001,64:140508. |
| [22] | G Hammerl;A Schmehl;R R Schulz;B Goetz,H Bielefeldt,C W Schneider,H Hilgenkamp,and J Mannhart .[J].NATURE,2000,407:162. |
| [23] | J Y Laval;T S Orlova .Microstructure and superconducting properties of sintered DyBaCuO ceramics doped by Ca[J].Superconductor Science & Technology,2002(8):1244-1251. |
| [24] | J Y Laval;T S Orlova .Effect of Ca doping on microstructural and superconducting properties of DyBa_2Cu_3O_(7-delta)/Ca_z (0<=z<=0.2) ceramics[J].Superconductor Science & Technology,2003(10):1139-1146. |
| [25] | X S Wu;W S Tan;Y M Xu;E M Zhang,J Du,A Hu,S S Jiang,J Gao .[J].Physica C,2003,398:131. |
| [26] | 李志权;杨宏顺;任治安;余旻,柴一晟,李鹏程,曹烈兆 .[J].低温物理学报,2001,23:34. |
| [27] | 尹道乐,齐志,许恒毅,王福仁,李传义.MgB2及高温超导体的强电子-声子耦合和输运性质[J].低温物理学报,2001(04):261-268. |
| [28] | 彭振生,刘宁,徐素军,童伟.Er低掺杂（0.0≤x≤0.20）对La0.67Sr0.33MnO3输运行为的影响[J].低温物理学报,2004(02):120-125. |
| [29] | 张力江,刘莉,夏正才,张国宏,冯文,唐洁,刘胜,袁松柳.La4/3（Sr1-xBax）5/3Mn2O7的电输运性质研究[J].低温物理学报,2004(04):304-308. |
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