Extended Data Fig. 7: Raman spectra of the ceramics.
From: Skyrmion nanodomains in ferroelectric–antiferroelectric solid solutions
a, PTSx=0.25. b, PTHx=0.25. c, PTZx=0.25. d, PbTiO3. e, Enlarged views of the Raman spectra in 30~100 cm−1 region for the PTSx=0.25, PTHx=0.25, and PTZx=0.25 solid solutions with the intensity of E(TO1) mode normalized to 1.0 and f, The PbTiO3. In the Raman spectra, the AFD mode appears at ~45 cm−1, on the left side of the E(TO1) mode (e, f). To facilitate the comparison, the intensities of the E(TO1) modes are normalized to 1.0, as indicated by the horizontal dashed lines. As shown, at the same antiferroelectric concentration of x = 0.25, the PTSx=0.25 exhibits the strongest AFD mode intensity and the AFD mode intensity decreases successively from PTSx=0.25 to PTHx=0.25 and then to PTZx=0.25. For PbTiO3, there is no AFD mode.
