Structural properties of Fe-doped lanthanum gallate

Mori, Kazuhiro; Fukunaga, Toshiharu; Shibata, K.; Iwase, Kenji; Harjo, Stefanus; Hoshikawa, Akinori; Itoh, Keiji; Kamiyama, Takashi; Ishigaki, Tōru

doi:10.1016/j.physb.2004.07.004

Cited by 8 publications

(1 citation statement)

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“…The transition temperature depends on shows an increasing trend when the La is substituted by smaller lanthanide ions [22,23]. Also, the phase transition temperature increases when Ga is partially replaced by the transition metal ions in LaGaO 3 [24]. Sammes et al reported unidentified phases in Sr and Mg doped LaGaO 3 [15], which were later identified as a different orthorhombic or monoclinic phase [14].…”

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Structural phase transition in lanthanum gallate as studied by Raman and X‐ray diffraction measurements

Dhak

Pramanik

Bhattacharya

et al. 2011

Physica Status Solidi (b)

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Lanthanum gallate (LaGaO 3 ) is known to undergo orthorhombic to rhombohedral first order phase transition at 150 8C. In this article we have shown that by introducing 2% La deficiency in the system, coexistence of above two phases can be obtained at lower temperature and a complete phase transition occurs at 200 8C. The evolution of structural parameters of the system with temperature is reported from X-ray diffraction measurements and Rietveld analysis of the diffraction patterns. The change in local octahedral distortion due to 2% La deficiency is revealed through the shift in the phonon modes of GaO 6 octahedra, in both orthorhombic and rhombohedral phase.

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confidence: 99%