Resistivity-temperature characteristics of Y-deficient YBCO thin films derived by TFA-MOD method

被引：2

作者：

Zhang, L

Zhu, XB ^{[1
]}

Song, WH

Ma, RC

Liu, SM

Du, JJ

Sun, YP

机构：

[1] Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Hefei 230031, Peoples R China

[2] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2004年 / 415卷 / 03期

关键词：

YBCO; flux pinning; MOD;

D O I：

10.1016/j.physc.2004.06.005

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Y-deficient Y1-xBa2Cu3O7-sigma films(x = 0, 0.05, 0.1) are fabricated on LaAlO3 (0 0 1) single crystal substrates using trifluoroacetate-based metalorganic deposition (TFA-MOD). X-ray diffraction patterns show that all films are highly c-axis oriented. The measurement of the resistance transition broadening under the applied magnetic field perpendicular to the surfaces of YBCO films indicates that a slight Y-deficiency (Y0.95Ba2Cu3O7-sigma) in YBCO films is favorable to improve flux pinning. However, a further increasing of Y-deficiency (Y0.9Ba2Cu3O7-sigma) leads to the degeneration of flux pinning abilities. The improvement of flux pinning may be related to the BaCuO2 phase particles with submicrometer scale or the defects induced by slight Y-deficiency. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：79 / 84

页数：6