fig1

Figure 1. (A) Schematic diagram of HPHT synthesis process; (B) X-ray diffraction (XRD) patterns of (Sr_0.2La_0.2Nd_0.2Sm_0.2Eu_0.2)TiO₃ synthesized under varying pressures; (C) Lattice parameters calculated by Rietveld refinement; (D) Schematic representation of the high-entropy SrTiO₃ crystal structure. HPHT: High temperature and high pressure.