论文标题
通过调谐C/A比
Axis thermal expansion switching in transition-metal zirconides TrZr2 by tuning the c/a ratio
论文作者
论文摘要
这项研究研究了各种Cual2型化合物的晶格常数的温度依赖性演变，包括Nizr2，（CO，RH，IR）ZR2，（Fe，Co，Co，Rh，rh，ir）Zr2和（Co，Ni，ni，cu，rh，rh，rh，ir）Zr2，追求负或零热扩张。结果表明，NIZR2具有阳性热膨胀，而其他化合物沿C轴收缩表现出单轴负热膨胀。该研究表明，可以通过通过TR位点取代来操纵C/A比，可以控制C轴热膨胀，从而提供了一种设计原理，以实现C轴的负热膨胀，并在TRZR2化合物中单个化合物中的单个化合物中的潜在零热膨胀。
This study examines the temperature-dependent evolution of the lattice constants for various CuAl2-type compounds, including NiZr2, (Co,Rh,Ir)Zr2, (Fe,Co,Rh,Ir)Zr2, and (Co,Ni,Cu,Rh,Ir)Zr2, in the pursuit of negative or zero thermal expansion. Results reveal that NiZr2 has positive thermal expansion, while the other compounds exhibit uniaxial negative thermal expansion along the c-axis contraction. The study suggests that the c-axis thermal expansion can be controlled by manipulating the c/a ratio through Tr-site substitution, providing a design principle for achieving negative thermal expansion of the c-axis and potentially zero thermal expansion in a single compound in TrZr2 compounds.
