Universal spin-glass behaviour in bulk LaNiO2, PrNiO2 and NdNiO2

Abstract

Motivated by the recent discovery of superconductivity in infinite-layer nickelate thin films, we report on a synthesis and magnetization study on bulk samples of the parent compounds $R$NiO${}_2$ ($R$=La, Pr, Nd). The frequency-dependent peaks of the AC magnetic susceptibility, along with remarkable memory effects, characterize spin-glass states. Furthermore, various phenomenological parameters via different spin glass models show strong similarity within these three compounds as well as with other rare-earth metal nickelates. The universal spin-glass behaviour distinguishes the nickelates from the parent compound CaCuO${}_2$ of cuprate superconductors, which has the same crystal structure and $d^9$ electronic configuration but undergoes a long-range antiferromagnetic order. Our investigations may indicate a distinctly different nature of magnetism and superconductivity in the bulk nickelates than in the cuprates.

15 pages, 8 figures

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• Magnetic correlations in infinite-layer nickelates: an experimental and theoretical multi-method study
• Electronic structure and magnetic correlations in trilayer nickelate superconductor La${}_4$Ni${}_3$O${}_{10}$ under pressure
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• Superconductivity in PrNiO2 infinite-layer nickelates
• Geometric effects in the infinite-layer nickelates
• Topotactic-hydrogen forms chains in $AB$O${}_2$ nickelate superconductors
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• Structural instabilities of infinite-layer nickelates from first-principles simulations
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• Influence of $f$ Electrons on the Electronic Band Structure of Rare-Earth Nickelates
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• Spin-glass state in nickelate superconductors
• Pressure effects on the electronic structure and magnetic properties of infinite-layer nickelates
• Orbital-selective spin-triplet superconductivity in infinite-layer LaNiO${}_2$