Figure 4

(a) Raman spectra measured using 442 nm in a line scan crossing the stripe ___domain. The spectra measured on the large ___domain are plotted by dashed lines, and those measured on the stripe ___domain by continuous lines. (b) The peak areas of the 138 cm⁻¹ and 172 cm⁻¹ modes show well separated stripe and large domains when measuring with 442 nm excitation line (full symbols). The interface region shows a continuous change in the peak areas when measuring with 633 nm excitation line (open symbols). The inset shows schematically the interface between the two ___domain types.