Precise magnetic structure of the low-pressure phase of La3Ni2O7

Determine the exact spin-density-wave magnetic structure of La3Ni2O7 in the low-pressure phase, including ordering wave vectors, layer stacking along the c axis, and moment orientations, and reconcile results from μSR, NMR, RIXS, neutron scattering, and transport.

Background

Multiple probes (μSR, NMR, RIXS, neutron diffraction) indicate density-wave behavior and magnetic ordering around 150 K in low-pressure La3Ni2O7, with proposals ranging from spin–charge stripe orders to double spin‑stripe configurations.

Despite this progress, the authors state that the precise magnetic structure remains under debate, likely due to sample inhomogeneity and coexistence of structural phases, underscoring the need for definitive determination on homogeneous single crystals.