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Experimental studies on crystal structures and phase transitions in perovskite-type RbNbO3
2023 年 131 巻 5 号 p. 126-129
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2023 年 131 巻 5 号 p. 126-129
In this study, we investigate the phase transitions of a promising perovskite niobate, RbNbO3, by synchrotron X-ray diffraction, differential scanning calorimetry, and dielectric property measurements. This compound shows a first-order orthorhombic–tetragonal phase transition at 519 K and does not undergo a transition to a rhombohedral phase down to 5 K. Notably, the spontaneous polarization of the orthorhombic phase is larger than that of a well-studied isostructural perovskite niobate, KNbO3.
