New Perspectives on the Physics of High-Field Superconductors
New Perspectives on the Physics of High-Field Superconductors
复制标题
高场超导体物理的新视角
DOI：
10.1007/978-1-4613-3542-9_34
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
M. Beasley
中科院分区：
文献类型：
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作者：
M. Beasley
在制造实用的高场超导导体时，制造商面临着同时优化几种性质的问题（例如，Tc、Hc2、Jc和机械性能），所有这些本身都取决于各种材料参数。与此同时，有必要将导体制造成嵌入普通金属基体中的细捻丝的形式。不用说，这不是一件简单的事情，并且在执行这样的任务时，尽可能清楚地理解感兴趣的物理性质如何取决于各种材料参数是有帮助的。在本文中，我们回顾了最近的进展，在理解的上临界场，Hc2，真实的高场超导体，在努力提供一些改进的指导，实际导体社区在这方面。特别是，我们解决的作用，确定Hc2的A15超导体和修正的泡利限制的理论，最近已经曝光的无序。从这些结果中获得的见解也被用来提供一个最新的一套基本规则，优化Hc2和建立预期的理论极限Hc2在超导体的实际利益。
In making a practical high-field superconducting conductor, the manufacturer is confronted with the problem of optimizing simultaneously several properties (e.g., Tc, Hc2, Jc, and mechanical behavior), all of which themselves depend on a variety of material parameters. At the same time it is necessary to fabricate the conductor in the form of fine, twisted filaments imbedded in a normal metal matrix. This is no simple matter, needless to say, and in carrying out such a task it is helpful to have as clear an understanding as possible of how the physical properties of interest depend on the various material parameters. In this paper we review recent advances in the understanding of the upper critical field, Hc2, of real high-field superconductors in an effort to provide some improved guidance to the practical conductor community in just this regard. In particular, we address the role of disorder in determining Hc2of the A15 superconductors and corrections to the theory of Pauli limiting that have come to light recently. The insights obtained from these results are also used to provide an up-to-date set of ground rules for optimizing Hc2and to establish expected theoretical limits of Hc2in superconductors of practical interest.