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High pressure induces phase separation in lightly doped manganite, suggesting structural changes at high pressures.
In polycrystalline La0.95Ca0.05Mn0.98Fe0.02O3 manganite, high pressure leads to mesoscopic phase separation of the sample with the initial Jahn–Teller distortion of MnO6 octahedra and the emergence of regions with undistorted octahedra above 4 GPa, with a complete rearrangement of the structure above ~12 GPa. Raman scattering and X-ray diffraction data indicate significant heterogeneity of lightly doped samples.
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Zaitsev et al. (2026) studied this question.
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