CRYSTALLIZATION AND MAGNETO-TRANSPORT CHARACTERISTICS IN MOD YBa2Cu3O7-δ FILMS

被引：2
作者：
Gao, Bo [1 ]
Ying, Liliang [1 ]
Liu, Jinlei [1 ]
Lu, Yuming [1 ]
Liu, Zhiyong [1 ]
Cai, Chuanbing [1 ]
Huehne, Ruben [2 ]
Holzapfel, Bernhard [2 ]
机构：
[1] Shanghai Univ, Dept Phys, Shanghai 200444, Peoples R China
[2] Inst Metall Mat, IFW Dresden, D-01171 Dresden, Germany
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2009年 / 23卷 / 17期
关键词：
MOD; accommodation field; YBCO COATED CONDUCTORS; TEMPERATURE; PROGRESS; SUPERCONDUCTORS; WIRE;
D O I：
10.1142/S0217979209062815
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
YBa2Cu3O7-delta (YBCO) films are prepared on the substrate of single crystal LaAlO3 (LAO) by using metal trifluoroacetates deposition (TFA-MOD). The phase evolvement, magneto-transport and flux pinning characteristics in MOD-YBCO films are studied. It is revealed that Ba-Cu-O and Y-Cu-O precipitates are formed and can be controlled by optimum crystallization process. The field dependence of J(c) (H//c) shows that the accommodation field H-acc decreases exponentially with increasing temperature and the power-law relationship holds in the medium fields with an exponent a of about 0.67, nearly independent of temperatures. Compared with the samples grown by pulsed laser deposition, MOD films have larger H-acc at higher temperatures (> 50 K) indicating that the value of the exponent alpha is affected by the precipitates entrapped in the YBCO matrix.
引用
收藏
页码：3470 / 3475
页数：6
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