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SUPERCONDUCTING AND EPITAXIAL (TL,PB)SR2CA1-XYXCU2O7 THIN-FILMS BY IN-SITU DEPOSITION

被引：17
作者：
MYERS, KE
FACE, DW
KOUNTZ, DJ
NESTLERODE, JP
机构：
[1] DuPont Central Research and Development, Wilmington, DE 19880-0304
来源：
APPLIED PHYSICS LETTERS | 1994年 / 65卷 / 04期
关键词：
D O I：
10.1063/1.112303
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the growth of thin films of (Tl,Pb)Sr2Ca1-xYxCu2O7 with x=0-0.2 by off-axis magnetron sputtering in the presence of thallium oxide vapor. The (Tl,Pb)Sr2Ca1-xYxCu2O7 films are highly c-axis oriented on the pseudocubic (100) surface of LaAlO3 or on (001)NdGaO3. The [100] axes of the films grown on LaAlO3 align to the pseudocubic (100) axes of the substrate while for films on NdGaO3 they are rotated 45-degrees relative to orthorhombic (100) substrate axes. After an in situ heat treatment, undoped (Tl,Pb)Sr2CaCu2O7 films are superconducting at temperatures up to 82 K, compared with 85 K for the bulk material. Yttrium doping on the calcium site increased the transition temperature as expected. The highest transition temperature observed was 86 K for x=0.1 and 93 K for x=0.2.
引用
收藏
页码：490 / 492
页数：3
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