Axis thermal expansion switching in transition-metal zirconides TrZr2 by tuning the c/a ratio

Abstract

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.

13 pages, 4 figures

References in corpus (3)

• Anomalous thermal expansion in a CuAl2-type superconductor CoZr2
• Sign change in c-axis thermal expansion and lattice collapse by Ni substitution in Co1-xNixZr2 superconductors
• Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr2

Cited by in corpus (4)

• Specific heat analyses on optical-phonon-derived uniaxial negative thermal expansion system $Tr$Zr${}_2$ ($Tr$ = Fe and Co${}_{1-x}$Ni${}_x$)
• Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor
• Uniaxial negative thermal expansion in a tetragonal V3S-type superconductor IrZr3
• Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2