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Ceramic powder samples of the perovskite‐slab‐layered polycrystalline Sr1.9La0.1Nb2O7 (SLNO1) thermoelectric solid solution were prepared via solid‐state reaction. The Raman effect was studied as a function of temperature between 27°C and 400°C (at ambient pressure) and pressures up to 11.6 GPa (at room temperature). The atomic disorder introduced by the La atoms produced phonon lines that were broader...
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