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首页> 外文期刊>Physica, B. Condensed Matter >Compressibility anomaly in the superconducting material Nb _3Al under high pressure
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Compressibility anomaly in the superconducting material Nb _3Al under high pressure

机译:高压下超导材料Nb _3Al的压缩率异常

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摘要

Nb _3Al, which is widely used in high field magnets, was studied under a range of pressures up to 39.5 GPa using diamond anvil cell. The Nb _3Al superconductor is structurally stable up to the highest pressure of the present investigation from previous reports. However, an anomaly of the compressibility beyond 19.2 GPa was detected in the pressure versus volume plot. The curve of volume versus pressure shows the existence of a plateau around 18.0 GPa as seen in several other highly correlated electrons systems, The observed pressure-induced isostructural phase transition was accomplished with a volume inclination without any symmetrical change (space group, Wyckoff position). The physical mechanism behind this isostructural phase transition is the interesting issue for further studies.
机译:Nb _3Al,广泛用于高磁场磁体,使用金刚石砧盒在高达39.5 GPa的压力范围内进行了研究。 Nb _3Al超导体在结构上是稳定的,直到以前的研究提出的最高压力为止。但是,在压力与体积关系图中检测到了超过19.2 GPa的可压缩性异常。如在其他几个高度相关的电子系统中所见,体积与压力的关系曲线表明存在大约18.0 GPa的平台。观察到的压力诱导的同构相变是在体积倾斜的情况下完成的,没有任何对称的变化(空间群,Wyckoff位置) 。等构相转变背后的物理机制是值得进一步研究的有趣问题。

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