arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0704.3830cond-mat.supr-con
收藏

钉扎超导体中正交磁通相互作用的Critical state分析

Critical state analysis of orthogonal flux interactions in pinned superconductors

A. Badía-Majós, C. López

摘要:

我们表明,在硬超导体磁通线钉扎的临界状态模型的基础上,可以评估的磁矩弛豫引起的垂直磁场的振荡。我们的理论遵循最近的建议,使用现象学的2D建模的描述交叉场动力学在高T $_c$超导体[{ \tt arXiv:cond-mat/0703330}]。稳态制度,无论是饱和的亚稳态配置,或完全衰变的热力学平衡。两种类型的响应之间的过渡与样品内磁通自由芯的消失有关。作为一个共同的特点,在时间松弛的阶梯状的依赖性预测这两种情况下。该理论可应用于任意非均匀截面长杆在面内磁场作用下的变形。

英文摘要:

We show that, based on the critical state model for flux-line pinning in hard superconductors, one can assess the magnetic moment relaxation induced by the oscillations of a perpendicular magnetic field. Our theory follows a recent proposal of using phenomenological 2D modeling for the description of crossed field dynamics in high-T$_c$ superconductors [{\tt arXiv:cond-mat/0703330}]. Stationary regimes with either saturation to metastable configurations, or complete decay to the thermodynamic equilibrium are obtained. The transition between both types of response is related to the disappearance of a flux free core within the sample. As a common feature, a step-like dependence in the time relaxation is predicted for both cases. The theory may be applied to long bars of arbitrary and non homogeneous cross section, under in-plane magnetic field processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑