Anisotropy and Lorentz-Force Dependences of Critical Current Density in C-Axis-Oriented YBa2Cu3O7-δ Thin Film
Anisotropy and Lorentz-Force Dependences of Critical Current Density in C-Axis-Oriented YBa2Cu3O7-δ Thin Film
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DOI：
10.1143/jjap.44.l111
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发表时间：
2004
影响因子：
1.5
通讯作者：
T. Horide;K. Matsumoto;Y. Yoshida;M. Mukaida;A. Ichinose;S. Horii;K. Osamura
中科院分区：
文献类型：
--
作者：
T. Horide;K. Matsumoto;Y. Yoshida;M. Mukaida;A. Ichinose;S. Horii;K. Osamura
测量了c轴取向的YBa2Cu3O7-θ(YBa2Cu3O7-δ)薄膜在恒定和可变洛伦兹力配置下的Jc(Lorentz)随磁场角度的变化关系。当磁场与c轴在±30°范围内倾斜时，Jc(θ)与洛伦兹力的强度无关。这表明涡旋具有被平行于c轴延伸的钉扎中心捕获的弯曲段，而Jc(θ)受这些段的去钉扎的限制。当磁场从ab平面倾斜到±30°时，应考虑平行于c轴和平行于ab平面的两种钉扎中心对Jc(θ)的影响。
The magnetic field angular dependence of Jc(θ) for a c-axis-oriented YBa2Cu3O7-δ (YBCO) thin film was measured using both constant and variable Lorentz force configurations. When the field was tilted from the c-axis within ±30°, Jc(θ) was independent of the intensity of the Lorentz force. This demonstrates that the vortices have bent segments trapped by pinning centers that extend parallel to the c-axis, and Jc(θ) is limited by the depinning of these segments. The effect on Jc(θ) of the two types of pinning centers, i.e., either parallel to the c-axis or to the ab plane, should be considered when the field is tilted from the ab plane within ±30°.