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 RNiO2 (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 CaCuO2 of cuprate superconductors, which has the same crystal structure and d9 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.
@article{arxiv.2104.14324,
title = {Universal spin-glass behaviour in bulk LaNiO2, PrNiO2 and NdNiO2},
author = {Hai Lin and Dariusz Jakub Gawryluk and Yannick Maximilian Klein and Shangxiong Huangfu and Ekaterina Pomjakushina and Fabian von Rohr and Andreas Schilling},
journal= {arXiv preprint arXiv:2104.14324},
year = {2022}
}