在流动的氧气大气中探索YbBa2Cu3O7-y超导体的制备
Yanan Wang1,2, Zerong Zhang3, Zhan Gao1,2
1School of Rare Earths, University of Science and Technology of China, Hefei, 230026, China.
Scientific reports
|April 18, 2024
概括
这项研究阐明了Ytterbium Barium Copper Oxide (Yb123) 超导体的形成机制. 最佳合成涉及特定的回火温度,为Yb123涂层导体产生高相纯度和出色的超导性能.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 超导电性 超导电性 超导电性
背景情况:
- 稀土铜氧化物 (REBCO) 涂层导体对于超导磁体至关重要.
- YbBa2Cu3O7-y (Yb123) 是一个具有低点的REBCO超导体,用于超导联接制备.
- Yb123的形成机制和合成仍然不完全理解.
研究的目的:
- 系统地研究在流动氧气中进行热处理时Yb123的相变过程.
- 为了阐明Yb123.3的形成机制.
- 为了优化高纯度Yb123.3的合成条件.
主要方法:
- 在不同温度下在流动氧气中对Yb123进行热处理.
- 定量阶段分析以确定样品的纯度.
- 通过X射线衍射来评估纹理.
- 超导性能测量 (Tc,临界电流密度).
主要成果:
- 通过在927°C或937°C的化实现了Yb123的最高相位纯度,但不是中间温度.
- 在937°C的化过程中,其相位纯度高于80%的重量,并且具有强烈的c轴纹理.
- 在937°C准备的Yb123样本的Tc为89.9K,临界电流密度为1.3×10^5A/cm2 (4.2K) 和5.0×10^3A/cm2 (77K).
结论:
- 详细阐述了Yb123在流动氧气中的相变过程和形成机制.
- 特定的回火温度对于获得高纯度Yb123.3至关重要.
- 优化的Yb123表现出对应用程序有前途的超导特性.
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