近来几个超导研究小组相继报导MgB2磁通线的涡旋相图具有与高温超导体相似的特性,而且该超导体电阻率在外场中展宽的超导区大部份对应涡旋液体相.本文发展了一种新的求导超导体有效钉扎势方法,并利用MgB2电阻在外场中的展宽测量数据,发现在超导转变区,其有效钉扎势相应温度的函数关系分为两个区域,其中一个区的热激活能和温度的关系是线性的,另外一个区是非线性的.这明确表明与F. Bouquet et al(Nature,411(2001), 448)发现高温超导体YBa2Cu3O7-δ具有两个涡旋液体相相类似.MgB2的涡旋液体相也同样具有两个不同的液体相.
参考文献
| [1] | Nagamalsu J;NakagawaN;Maranaka T;ZenitaniY,andAkimilsuJ .[J].Nature,2001,410:63. |
| [2] | Qin M J;WangXL;Soltanian S;LiAH,LioHK,andDouSX .[J].Physical Review,2001,B64:060505. |
| [3] | Kim Hyeng-Jin;Kang WN;Choi Eun-Mi;Kim Mum-Seog Kim kijoon H P, Lee Sung-IK, .[Z].,2001. |
| [4] | Wen H H;LiSL;Zhao Z W;JinH,NiYM,KangWN,JimHyeong-Jin,ChoiEum-Mi,andLeeSung-IK .[J].Physical Review,2001,B64:134505. |
| [5] | Thompson J R;ParanthamanMChristenDK;Sorge K D;KimHJ andOssandonJG .[J].Superconductor Science and Technology,2001,14:117. |
| [6] | Yau J K F;QinMJ;Liu H K;DouSX,LeeCM,HanYS,ShenLJ,andXJin .[J].Superconductor Science and Technology,2002,15:619. |
| [7] | Choi HJ;Roundy D;Sun H;Cohen ML;Louie SG .The origin of the anomalous superconducting properties of MgB(2).[J].Nature,2002(6899):758-760. |
| [8] | Crabtree George W;Nelson David R .[J].Physics Today,1997,50:38. |
| [9] | Blatter G;Feigel′manMV;Geshkenbein;VB,LarkinAI,VinokurVM .[J].Reviews of Modern Physics,1994,66:1152. |
| [10] | Beasley M R;LabuschR;Webb W W .[J].Physical Review,1969,181:682. |
| [11] | Maley M P;WillisJQ;Lessure H;McHenryME .[J].Physical Review B,1990,42:2639. |
| [12] | Griessen R;WenHaiku;van Dalen A J J;DamB,RectorJ,SchnackHG .[J].PHYSICAL REVIEW LETTERS,1994,22:1910. |
| [13] | Wen HH.;Griessen R.;Dam B.;Rector J.;Schnack HG. .CRITICAL CURRENT, MAGNETIZATION RELAXATION AND ACTIVATION ENERGIES FOR YBA2CU3O7 AND YBA2CU4O8 FILMS[J].Physica, C. Superconductivity and its applications,1995(3/4):353-374. |
| [14] | Nikolo M;GolkfarbRB .[J].Physical Review,1989,B39:6615. |
| [15] | Hung K C;JinX;Lam C C;GengJF,ChenWM,andHMChao .[J].Superconductor Science and Technology,1997,10:562. |
| [16] | Tinkham M .[J].Physical Review Letters,1988,61:1658. |
| [17] | Palstra T T M;BatlogB;Scheemayer L F;WaszczakJV .[J].Physical Review Letters,1998,61:1662. |
| [18] | Zeldov E;AmerNM;Koren G;GuptaA,McElfreshMW,andGambinoRJ .[J].Applied Physics Letters,1990,56:680. |
| [19] | Shan L;YauJKF;Jin X;LuRT FangL HeM YanSL KangL ShanWL andWuPH .[J].Superconductor Science and Technology,2001,14:457. |
| [20] | F Bouquet;CMarcenat;E Steep;R Calemczuk, W K Kwok, U Welp, G W Crabtree, R A Fisher, N E Phillips and A Schilling .[J].Nature,2001,411:448. |
| [21] | 刘伟,管炜,黄钧伟,冯庆荣,王昕,阎守胜.MgB2超导体正常态热电势的研究[J].低温物理学报,2001(04):247-250. |
| [22] | 李光临,宋炜,孟立飞,冯庆荣,高政祥,张西祥,温戈辉,郑荣坤.MgB2超导块材的非线性磁弛豫性质的研究[J].低温物理学报,2001(04):309-312. |
| [23] | 刘志斌,宋现峰,王永忠,高政祥.MgB2超导体掺Au的研究[J].低温物理学报,2003(01):71-75. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%