GROWTH OF (PB0.75CU0.25)SR2(Y1-YCAY)CU2O7 THIN-FILMS BY LASER ABLATION

被引:9
作者
HUGHES, RA [1 ]
LU, Y [1 ]
TIMUSK, T [1 ]
PRESTON, JS [1 ]
机构
[1] MCMASTER UNIV,DEPT ENGN PHYS,HAMILTON L8S 4M1,ONTARIO,CANADA
关键词
D O I
10.1063/1.105914
中图分类号
O59 [应用物理学];
学科分类号
摘要
In this letter we investigate the effects of varying the values of x and y in (Pb1-xCux)Sr2(Y1-yCay)Cu2O7 films deposited by laser ablation. The films are grown in situ on (100) LaAlO3 at the relatively low substrate temperature of 620-degrees-C. The films are highly oriented with the c-axis perpendicular to the substrate and exhibit a surface morphology which is unique to the oxide superconductors. By substituting Ca for Y it is possible to systematically vary the superconducting transition temperature from 10 K to a maximum of 86 K. On the other hand, variations in the value of x seem to suggest that the film's copper concentration in the (PbCu) plane can only exist within the narrow range of approximately x = 0.2-0.3 and any extra copper added to the target ends up in an impurity phase.
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页码:2597 / 2599
页数:3
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