Complex spin density wave ordering in
Phys. Rev. B 112, 174423 – Published 19 November, 2025
DOI: https://doi.org/10.1103/ncv2-7xnw
Abstract
The discovery of high-temperature superconductivity in layered nickelates under pressure has recently triggered enormous interest. Studies of these compounds have revealed a density-wave-like transition at ambient pressure, though its connection with superconductivity is still not well understood. Here, we report a detailed study on single crystals of trilayer nickelate at ambient pressure. We have identified a spin-density-wave (SDW) transition at the temperature of , as well as a broad crossover around 70–100 K. Based on the temperature dependence of the muon precession amplitudes and magnetic susceptibility, we attribute this additional crossover either to a spin reorientation, or to an inhomogeneous SDW ordering.