Anisotropy of the normal state properties of the superconducting Co1?x Ni x Zr2 system

Sign change in c-axis thermal expansion constant and lattice collapse by Ni substitution in transition-metal zirconide superconductor Co1−xNixZr2

“…NiZr 2 exhibits PTE in both a and c axes. In previous works [12][13][14] , synthesis and physical properties of a solid solution system of Co 1−x Ni x Zr 2 were reported with its superconducting properties. Here, we show that the c-axis thermal expansion character in Co 1−x Ni x Zr 2 is systematically changed from NTE, ZTE, and PTE with increasing Ni concentration x.…”

“…4a. Both CoZr 2 and NiZr 2 are known to be a superconductor [12][13][14] with T c of ~ 5 K and 1.6 K, respectively 14 . In addition, it has been reported that T c increases with slight Ni substitution in Co 1−x Ni x Zr 2 due to the enhancement of spin fluctuation 12 .…”