Fabrication of YBa2Cu3O7-y Bulk Superconductor Through Melt Growth

IF 0.6 4区 工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Sang Heon Lee
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引用次数: 0

Abstract

A YBa2Cu3O7-y bulk with the crystal orientation identical with that of single seed was grown from the seed by the application of melt growth, wherein YBa2Cu3O7-y superconductive green compact was placed on the upper part of Sm 123 superconductive seed single crystal. Field cooling was employed as the condition for the measuring magnetic levitation; it was measured at the temperature of liquid nitrogen, utilizing a Nd–Fe-B permanent magnet with the force of 3.86 kG. The magnetic levitation measurements yielded values of 23.537 N on the surface of the upper part and 30.562 N at the bottom of superconductive bulk magnet. The trapped magnetic forces on the surfaces of superconducting specimens were measured using a permanent magnet with a surface magnetic force of 5.25 kG. The measurements yielded values of 1.74 kG on the upper surface and 1.82 kG at the bottom of the superconducting bulk magnet. Superconducting single crystals were grown from specimens obtained from the upper and bottom parts of the bulk magnet. These specimens were prepared using the melt reaction process. The superconducting properties, such as magnetic levitation and trapped magnetic force, were found to be higher in the region that came into contact with the seed crystal.
通过熔融生长制造 YBa2Cu3O7-y 块状超导体
通过熔融生长法,将 YBa2Cu3O7-y 超导绿色紧凑体置于 Sm 123 超导种子单晶体的上部,从种子中生长出晶体取向与单晶种子相同的 YBa2Cu3O7-y 体。磁悬浮的测量条件是在液氮温度下,利用力为 3.86 kG 的钕铁硼永磁体进行场冷却。磁悬浮测量结果表明,超导块状磁体上部表面的磁力值为 23.537 N,底部为 30.562 N。使用表面磁力为 5.25 kG 的永久磁铁测量了超导试样表面的困磁力。测量结果显示,超导块状磁体上表面的磁力值为 1.74 kG,底部的磁力值为 1.82 kG。超导单晶是从块状磁体上部和底部获得的试样中生长出来的。这些试样采用熔融反应工艺制备。研究发现,在与籽晶接触的区域,磁悬浮和困磁力等超导特性较高。
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来源期刊
Journal of Nanoelectronics and Optoelectronics
Journal of Nanoelectronics and Optoelectronics 工程技术-工程:电子与电气
自引率
16.70%
发文量
48
审稿时长
12.5 months
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