Fig. 1: Neutron scattering under stress.

a Schematic of the strain cell used in the neutron scattering experiment. The bridges of the cell and sample plates are shown in grey, and the sample is shown with a blue-to-yellow colourmap to indicate the strain gradient induced along its length. Neutrons are scattered in transmission through the central strained region of the sample. b Magnetic structure of Ca₃Ru₂O₇ in the AFM_a phase²⁷. c Integrated intensity of the commensurate (0, 0, 1) and incommensurate (δ, 0, 1) peaks as a function of applied strain, ΔL/L. The background signal comes from scattering from the strain cell, and errors are standard deviations. The insets show detector images at zero and maximum compressive/tensile applied strain. d Magnetic structure of Ca₃Ru₂O₇ in the AFM_b phase²⁷.