论文标题
Fe基超导体的晶界特征
Grain boundary characteristics of Fe-based superconductors
论文作者
论文摘要
通过修改处理条件（所谓的GB工程），了解晶界（GB）特征的性质（GB）特征，与创建低能的GB，对于控制和降低缺陷密度非常重要，从而改善了多晶金属金属和陶瓷的功能。特别是对于超导体（包括低温和高温超导体），GB工程已经开发出来，尤其是在这些GB上改善临界电流密度JC。给定超导体的内在物理特性，例如相干长度，顺序参数对称性及其各向异性，将决定GB工程的策略。在这篇局部评论中，我们概述了基于多晶的散装和电线的形式的Fe基超导体（FBS）的GB特性和GB工程，以及具有应用潜力的薄膜，例如用于高场磁铁线。在进行FBS之前，还简要介绍了Cutrates和MGB2的GB工程。
Understanding the nature of grain boundary (GB) characteristics in combination with creating low-energy GBs by modifying the processing conditions, so-called GB engineering, is of great importance for controlling and reducing the defect density, leading to improved functionalities of polycrystalline metals and ceramics. For superconductors particularly, including both low- and high-temperature superconductors, GB engineering has been developed to improve especially the critical current densities, Jc, across these GBs. The intrinsic physical properties of a given superconductor such as the coherence length, the order parameter symmetry, and their anisotropies would determine the strategy of GB engineering. In this topical review, we present an overview of the GB characteristics and GB engineering of Fe-based superconductors (FBS) in the form of polycrystalline bulks and wires, and thin films with application potential, e.g. for high-field magnet wires. Prior to the FBS, GB engineering of the cuprates and MgB2 are also briefly covered.
