Magnetic shielding properties of GdBCO bulks with different crystal orientation
Magnetic shielding properties of GdBCO bulks with different crystal orientation
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DOI：
10.1016/j.phpro.2012.03.440
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
Z. Y. Zhang;S. Matsumoto;R. Teranishi;T. Kiyoshi
中科院分区：
文献类型：
--
作者：
Z. Y. Zhang;S. Matsumoto;R. Teranishi;T. Kiyoshi
高温体超导体在超导应用方面具有巨大的潜力。本文研究了不同晶体取向的 GdBCO 块体在不同温度下的磁屏蔽性能，以确定其作为场集中器的应用。从 GdBCO 单域上切下四个直径为 20mm、厚度为 5mm 的圆盘。在两个圆盘中，晶体的 c 轴平行于圆盘半径，而在其他圆盘中，c 轴垂直于圆盘半径。在高达 11 T 的背景场中测量了几个间隙为 2mm 的块体的磁屏蔽效应。在 LN2、LHe 和用低温冷却器控制的温度下测量了两个块体之间的中心和边缘点的磁场。在LHe中，c轴与外部磁场平行的圆盘保持高达11 T的零磁场。即使在LN2中，磁场也被屏蔽至1 T。结果证实了GdBCO块体的强磁屏蔽效应，可用于场集中器的设计。
High-temperature bulk superconductors have significant potential for superconductivity applications. For this paper, the magnetic shielding properties of GdBCO bulk with different crystal orientations were investigated at different temperatures for the purpose of determining its application as field concentrators. Four discs with a diameter of 20mm and thickness of 5mm were cut from the GdBCO single domain. In two discs, the c-axis of crystal was parallel to the disc radius, and, in the others, the c-axis was perpendicular to it. The magnetic shielding effects in a couple of bulks with a gap of 2mm were measured in background fields up to 11 T. The magnetic fields were measured at the center and edge points between the two bulks at LN2, LHe, and temperatures controlled with a cryocooler. In LHe, the discs whose c-axes were parallel to the external magnetic fields maintained a zero field up to 11 T. Even in LN2, the field was shielded to 1 T. The results confirmed the strong magnetic shield effects of GdBCO bulk and can be used for the design of a field concentrator.