在trigonal-PtBi2中增强弱超导性
J Zabala1, V F Correa1, F J Castro1
1Centro Atómico Bariloche and Instituto Balseiro, CNEA, CONICET and U. N. de Cuyo, 8400 San Carlos de Bariloche, Argentina.
概括
在1.1K的三角 γ-PtBi2 中观察到超导性,呈现出高临界磁场但低临界电流密度. 这些发现表明这种材料中存在不均的超导状态.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 超导电性 超导电性 超导电性
背景情况:
- 超导材料对于节能技术至关重要.
- 研究具有独特超导特性的新型材料对于推动科学理解和技术应用至关重要.
研究的目的:
- 为了研究三角形γ-PtBi2单晶体的超导特性.
- 确定γ-PtBi2.2.的临界温度 (Tc),临界磁场 (Hc2) 和临界电流密度 (Jc).
- 探索超导性在γ-PtBi2.2中的异构性和同质性.
主要方法:
- 在高质量的三角形 γ-PtBi2.2 单晶上进行电阻测量.
- 测量了临界磁场 (Hc2) 和临界电流密度 (Jc),作为温度和磁场的函数.
- 进行了磁化实验 (场冷却/零场冷却),以评估超导同质性.
主要成果:
- 在1.1K的临界温度 (Tc) 观察到超导性.
- 记录了超过1.5特斯拉的增强的临界磁场 (μ0Hc2(0) 和大约40 A cm−2的低临界电流密度 (Jc(0).
- 观察到微弱的异构性 (Γ < 1) 和在磁场下超导过渡的扩大/不对称性,表明超导状态不均.
结论:
- 三角形 γ-PtBi2 在环境压力下表现出超导性,具有显著的临界场特性.
- 观察到的低临界电流密度和过渡扩大表明一种不均的超导状态.
- 需要进一步的研究来了解这种材料的潜在机制和潜在应用.
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