AC response of YBa2Cu3O7 thin film superconductor

被引：7
作者：
Elabbar, Abdalla A. [1 ]
机构：
[1] Taibah Univ, Dept Phys, Madina, Saudi Arabia
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2009年 / 469卷 / 04期
关键词：
Nonlinear ac-susceptibility; YBa2Cu3O7 thin film; Critical current density; Critical state model; SUSCEPTIBILITY; FIELD; LINE;
D O I：
10.1016/j.physc.2009.01.002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Low-field ac measurements of magnetic susceptibility of YBa2Cu3O7 high-temperature superconducting thin film were carried out over a wide range of temperatures and ac magnetic field amplitudes. A strong field dependence of the real chi' and imaginary chi '' components was observed. The field dependence of the imaginary component is used to extract the temperature dependence of the critical current density in the sample using the critical state model. The exponent beta of the power law relation J(c) similar to (1 - T/T-c)(beta) was determined from ac-susceptibility data and different values were found. Experimental results are compared with predictions of some existing theoretical models describing the ac response of superconducting thin film in perpendicular ac field. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：147 / 150
页数：4
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