用自行研制的超声雾化装置在{110}<011>织构的Ag基带上直接沉积了YBCO涂层超导薄膜,结果发现一步沉积所得YBCO薄膜的表面有许多白色小颗粒,而且薄膜的织构和临界电流密度都较低,这是在900℃高温沉积过程中大量的Ag蒸发和扩散到YBCO膜层中所致.于是本文提出分高低温两步沉积的实验方案,即700℃先沉积15min,再升温到900℃沉积30min,通过SEM对薄膜表面和EDS能谱对薄膜的断面进行分析可知,两步沉积的YBCO薄膜中Ag的含量大大降低,而且薄膜的织构和临界电流密度得到明显改善和提高,最后通过两步沉积制备了15cm长、临界电流密度高于104A/cm2的YBCO超导薄膜.
参考文献
[1] | Kakimoto K,Iijima Y,Saitoh T,et al.Physica C 2002,378-381:937-943. |
[2] | Goyal Y,Lee D F,List F A,et al.Physica C 2001,357-360:903-913. |
[3] | Pomar A,Cavallaro A,Coll M,et al.Supercond.Sci.Technol.,2006,19:L1-L4. |
[4] | Obradors X,Puig T,Sandiumenge F,et al.Superconcl.Sci.Technol.,2006,19:S13-S26. |
[5] | Shields T C,Abell J S,Button T W,et al.Physica C,2002,372-376:747-750. |
[6] | MacManus-Driscoll J L,Ferreri A,Well J J,et al.Supercond.Sci.Technol.,2001,14:96-201. |
[7] | Suo H L,et al.Supercond.Sci.Technol,2001,14(10):854-861. |
[8] | Yoshina H,Yamazaki M,Thanh T D,et al.Physica C,2001,357-360:923-930. |
[9] | 刘敏,董杰,赵跃,等(Liu M,et al).无机材料学报(Journal of Inorganic Materials),2005,20(5):1257-1262. |
[10] | Liu M,Zhou M L,Zhai L H,et al.Physica C 2003,386:366-369. |
[11] | Gaskell D R.Introduction to MetMllurgical Thermodynamics.2nd.New York:Hemisphere Co.,1981.589-592. |
[12] | Tidjani M E,Gronsky R,et al.Physica C 1992,191:260-270. |
[13] | Pinto R,Apte P R,Pai S P,et al.Physica C 1993,207:13-17. |
[14] | Fan Z G,Shan Y Q,Wang W H,et al.Physica C,1997,282-287:495-496. |
[15] | Hasegawa M,Yoshida Y,Iwata M,et al.Japan J.Appl.PhysS.,2000,39:1719-1720. |
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