钙钛矿结构的金属氧化物LaNiO3与高温超导体YBa2Cu3O7-δ有着相近的晶格常数,并且有良好的导电性.我们在(100)SrTiO3基片上,用脉冲激光沉积法(PLD)成功的制备了单取向的LaNiO3,其表面起伏的均方根为1nm,电阻温度特性呈金属性.在此基础上,我们又原位制备了YBa2Cu3O7-δ/Eu2CuO4/LaNiO3三层结构.实验分析表明,高温超导薄膜YBa2Cu3O7-δ单一取向,临界温度在85K以上,超导转变宽度小于1.5K.这一结构对于研究高温超导体的准粒子注入和采用SIS或者SINIS结构构成高温超导约瑟夫森结等方面有着重要意义.
参考文献
[1] | T. Aytug;J. Z. Wu;C. Cantoni .Growth and superconducting properties of YBa_(2)Cu_(3)O_(7-δ) films on conductive SrRuO_(3) and LaNiO_(3) multilayers for coated conductor applications[J].Applied physics letters,2000(6):760-762. |
[2] | F Sánchez;C Ferrater;X Alcobé;J Bassas M V García-Cuenca M Varela .[J].Thin Solid Films,2001,384:200. |
[3] | S S Kim;T S Kang;J H Je .[J].Thin Solid Films,2002,405:117. |
[4] | F Sánchez;M V García-Cuenca;N Domingo;C FerraterM Varela .[J].真空,2002,64:337. |
[5] | W B Wu;K H Wong;P W Chan .[J].Physica C,1998,297:247. |
[6] | F Sánchez;C Ferrater C;Guerrero M V;García-Cuenca M Varela .[J].Applied Physics A:Materials Science and Processing,2000,71:59. |
[7] | D Kumar;K M Satyalakshmi;M S Hegde;Prakash R Apte Richard Pinto .Apte and Richard Pinto[J].IEEE Transactions on Applied Superconductivity,1995,5(04):3498. |
[8] | C Y Yau;W H Tang;J Gao .[J].Physica C,2000,341-348:2385. |
[9] | C Y Yau;W H Tang;J Gao .[J].Physica C,2000,341-348:2387. |
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