Materials preparation and magnetization of Gd-Ba-Cu-O bulk high-temperature superconductors
Materials preparation and magnetization of Gd-Ba-Cu-O bulk high-temperature superconductors
复制标题
Gd-Ba-Cu-O块体高温超导体的材料制备与磁化
DOI：
10.1088/0953-2048/29/5/054005
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发表时间：
2016
影响因子：
3.6
通讯作者：
Yufeng Zhang and Mitsuru Izumi
中科院分区：
文献类型：
--
作者：
Tetsuya Ida;Zhi Li;Difan Zhou;Motohiro Miki;Yufeng Zhang and Mitsuru Izumi
本文报道了高温超导块材制备和磁化方面的最新研究成果。高温超导块材的熔融生长在技术上是稳定的，这是由于使用了具有晶种的缓冲材料和改进的渗透以在生长期间提供富液相。这种改良的生长技术被改编为我们的标准加工方法。本文介绍了磁场冷却和脉冲磁场磁化过程的一些新方面。脉冲场磁化使用波形控制，其反馈围绕块体的顶部中心的瞬态通量，并捕获1.63 T的场，这是场冷却值的90%以上。这通过在液氮温度下施加单步脉冲场来实现。对于实际应用，在液氮温度下研究了从晶体学c轴倾斜的静磁场下的磁化强度。与沿轴沿着的过程相比，垂直于体表面的捕获通量分量在θ= 30 °倾角时仍然很强。关于HTS块体的信息被认为对于使用块体HTS作为低温永磁体的机器应用是重要的。
The paper reports on recent achievements in the preparation and magnetization of bulk high-temperature superconductors (HTS). The melt-growth of HTS bulks has technically stabilized due to the use of buffer materials with a seed crystal and modified infiltration to supply a rich liquid phase during growth. This modified growth technology was adapted as our standard processing method. This paper describes some new aspects of both field cooling and pulsed field magnetization processes. Pulsed field magnetization uses waveform control that feeds back the transient flux around the top-center of the bulks and traps a field of 1.63 T, which is more than 90% of the field cooling value. This was achieved by applying a single step pulsed field at a liquid nitrogen temperature. For practical applications, the magnetization under a static magnetic field that is tilted from the crystallographic c-axis was investigated at liquid nitrogen temperature. The trapped flux component perpendicular to the bulk surface remains strong up to θ= 30 inclination, compared to the procedure along the axis. Information about HTS bulks is considered to be important for machine applications using bulk HTS as cryo-permanent magnets.