Development and characterisation of dysprosium barium niobate:: a new substrate for YBa2Cu3O7-δ and (Bi,Pb)2Sr2Ca2Cu3Ox superconductor films

被引:10
|
作者
Kurian, J [1 ]
Pai, SP [1 ]
Sajith, PK [1 ]
Nair, KVO [1 ]
Kumar, KS [1 ]
Koshy, J [1 ]
机构
[1] CSIR, Reg Res Lab, Trivandrum 695019, Kerala, India
来源
PHYSICA C | 1999年 / 316卷 / 1-2期
关键词
dysprosium barium niobate; YBa2Cu3O7-delta; (Bi; Pb)(2)Sr2Ca2Cu3Ox;
D O I
10.1016/S0921-4534(99)00247-6
中图分类号
O59 [应用物理学];
学科分类号
摘要
Dysprosium barium niobate has been developed as a new substrate suitable for both YBa2Cu3O7-delta (YBCO) and (Bi, Pb)(2)Sr2Ca2Cu3Ox [Bi(2223)] superconductor films. DyBa2NbO6 (DBNO) has a cubic perovskite (A(2)BB'O-6) structure with a lattice constant a = 8.456 Angstrom. DBNO was found to have a thermal expansion coefficient of 7.806 X 10(-6)degrees C-1 and a thermal conductivity of 67.9 W m(-1) K-1. The dielectric constant and loss factor values of DBNO are also in a range suitable for its use as substrate for microwave applications. Both YBCO and Bi(2223) superconductors did not show any detectable chemical reaction with DBNO even under extreme processing conditions. Dip-coated YBCO thick film on polycrystalline DBNO substrate gave a T-c(0) of 92 K and J(c) of similar to 1.1 X 10(4) A cm(-2). Bi(2223) thick film dip-coated on DBNO gave T-c(O) of 110 K and J(c) of similar to 4 X 10(3) A cm(-2). (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:107 / 112
页数:6
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