Synthesis and Properties of La${}_{1-x}$Sr${}_x$NiO${}_3$ and La${}_{1-x}$Sr${}_x$NiO${}_2$

Abstract

Superconductivity has been realized in films of La${}_{1-x}$Sr${}_x$NiO${}_2$. Here we report synthesis and characterization of polycrystalline samples of La${}_{1-x}$Sr${}_x$NiO${}_3$ and La${}_{1-x}$Sr${}_x$NiO${}_2$ ($0\le x\le 0.2$). Magnetization and resistivity measurements reveal that La${}_{1-x}$Sr${}_x$NiO${}_3$ are paramagnetic metals and La${}_{1-x}$Sr${}_x$NiO${}_2$ exhibit insulating behavior. Superconductivity is not detected in bulk samples of La${}_{1-x}$Sr${}_x$NiO${}_2$. The absence of superconductivity in bulk La${}_{1-x}$Sr${}_x$NiO${}_2$ may be due to the generation of hydroxide during reduction or a small amount of nickel impurities. The effect of interface in films of La${}_{1-x}$Sr${}_x$NiO${}_2$ may also play a role for superconductivity.

9 pages, 4 figures

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Cited by in corpus (7)

• Superconductivity near 80 Kelvin in single crystals of La3Ni2O7 under pressure
• Evidence for charge and spin order in single crystals of La${}_3$Ni${}_2$O${}_7$ and La${}_3$Ni${}_2$O${}_6$
• Signature of superconductivity in pressurized La${}_4$Ni${}_3$O${}_{10}$
• Correlated electronic structure, orbital-selective behavior, and magnetic correlations in double-layer La${}_3$Ni${}_2$O${}_7$ under pressure
• Signature of Superconductivity in Pressurized Trilayer-nickelate Pr${}_4$Ni${}_3$O${}_{10-\delta }$
• Superconductivity in freestanding infinite-layer nickelate membranes
• Synthesis of thin film infinite-layer nickelates by atomic hydrogen reduction: clarifying the role of the capping layer