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
收藏
页码：79 / 84
页数：6
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