论文标题
四方V3S型超导体IRZR3中的单轴负热膨胀
Uniaxial negative thermal expansion in a tetragonal V3S-type superconductor IrZr3
论文作者
论文摘要
最近，在包括四方（Cual2-Type）COZR2和Orthorhombic（RE3B-type）COZR3的过渡金属锆石中观察到了单轴负热膨胀（NTE）。在这里，我们报告了四方（V3S型）IRZR3中单轴NTE的观察。随着温度的升高，A轴的晶格参数和IRZR3的体积增加，但C轴的晶格参数降低。 IRZR3是一种超导体，过渡温度为2.3K。目前的结果表明，单轴NTE和相关的异常轴热膨胀发生在各种过渡金属锆石中，这对于使用零心电expansion-Expansion-Expansion-Expansion超级导管的温度循环设计非常重要，这对于设计超导型非常重要。
Recently, uniaxial negative thermal expansion (NTE) has been observed in transition-metal zirconides including tetragonal (CuAl2-type) CoZr2 and orthorhombic (Re3B-type) CoZr3. Here, we report the observation of uniaxial NTE in tetragonal (V3S-type) IrZr3. With increasing temperature, the lattice parameter for the a-axis and volume of IrZr3 increase, but the lattice parameter for the c-axis decreases. IrZr3 is a superconductor with a transition temperature of 2.3 K. The present result suggests that uniaxial NTE and related anomalous axis thermal expansion occur in various transition-metal zirconides, which will be important for designing superconducting device robust to temperature cycles using zero-thermal-expansion superconductors.
