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.

References

However, the precise magnetic structure of La$_3$Ni$_2$O$_7$ remains under debate.

— Recent progress in nickelate superconductors  (2509.08386 - Wang et al., 10 Sep 2025) in Section 3.2 Density waves in 327

The dashed line marks an additional density-wave transition ($T_{\text{DW}$), whose origin remains under debate.

— Unconventional Pressure Evolution of Spin-Density-Wave State in La$_{3}$Ni$_{2}$O$_{7}$  (2608.17505 - Zhou et al., 18 Aug 2026) in Figure 1 caption, Results section