H Nakao, Y Sawata, M Mizumaki, Y Yamasaki, H Kuwahara, T Saitoh
Journal of Physics: Conference Series, 3010(1) 012159-1-012159-5, May 1, 2025 Peer-reviewed
Abstract
Phase separation between the CE-type charge-orbital ordered (CE) phase and the A-type antiferromagnetic ordered (A-AF) phase has been investigated in the bilayer manganite, La2-2x Sr1+2x Mn2O7 (x = 0.51), by resonant soft X-ray scattering (RSXS) at the Mn L 2,3 edge. The order parameters of CE and A-AF phases were measured at 1/4 1/4 0 and 0 0 1 reflections, respectively, and the phase separation was observed at the intermediate temperature region. Using a scanning-type RSXS with an X-ray focused by a Fresnel zone plate, the real-space images of domains for both the competing CE-phase and A-AF-phase were successfully observed. In the phase-separated state, we revealed that the domain of the CE phase forms a stripe pattern, and it seems to originate from the inhomogeneity of the chemical composition on sample.