IR-spectroscopic characterization of A2BB′O6 perovskites

Lavat, Araceli Elisabet; Baran, Enrique J.

doi:10.1016/s0924-2031(03)00059-6

Cited by 97 publications

(58 citation statements)

References 35 publications

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“…, respective to composition which are usually used to identify the perovskite phase formation. 15 The figure 3 clearly shows that all spectra present the typical band pattern characteristic of the perovskite structure between 850 -400 cm ).…”

Section: Resultsmentioning

confidence: 86%

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite

Gorodea

2014

Acta Chemica Iasi

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Double perovskite-type oxide Ca 2 BMoO 6 materials, where B = Cr, La and Sm, were prepared by the sol-gel auto-combustion method for the first time. The role of different B-site cations on their synthesis, structures, and magnetic properties was investigated. The synthesis progress was followed by the Fourier transform infrared spectroscopy and the samples' structure was investigated by X-ray diffraction. The increase of the ionic radii B leads to the decrease of the t-value which reflects the structural distortion from the ideal cubic perovskite. Magnetization measurements were made with a SQUID magnetometer. All compounds are ferimagnetic and magnetic properties are indirectly influenced by the distortion degree of the lattice and disorder on the B/B' positions.

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Section: Resultsmentioning

confidence: 86%

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite

Gorodea

2014

Acta Chemica Iasi

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“…The shift of stretching vibration to lower wavelengths is due to stronger interactions between the cation and oxygen atoms (owing to the electronegativity of the metal). [15,16] Therefore, the IR spectra at 773 (Fig. 1a) and 973 K (Fig.…”

Section: Ir Resultsmentioning

confidence: 99%

“…1c) Note the decrease in intensity of the symmetric (u s ) band with the introduction of cations with smaller ionic radii in the system. Also, the anti-symmetric u as stretching vibration (589 to 552 cm À1 ) of double perovskite-type oxide [15] characteristic of octahedral BiO 6 , and the bands at 437 cm À1 characteristic of Dy-O stretching vibration, [17] become predominant with increasing temperature. This asymmetric band intensity variation leads to the idea that the Bi-O bond strength increases with increasing ionic radii of A 2þ cations, which means stabilisation of compound structures.…”

Section: Ir Resultsmentioning

confidence: 99%

Influence of A-site Cation on Structure and Dielectric Properties in A2DyBiO6 (A=Mg, Ca, Sr, Ba) Double Perovskites

Feraru

Borhan

Samoilă³

et al. 2014

Aust. J. Chem.

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Double perovskite metal oxides with formula A 2 DyBiO 6 (A ¼ Mg, Ca, Sr, Ba) were synthesised by a sol-gel autocombustion method, using citric acid as the combustion agent. The effects of A-site cation on the structure, morphology, and dielectric properties were examined. The synthesis was monitored using Fourier transform infrared spectroscopy (FTIR) to indicate the absence of organic phase. X-ray diffraction (XRD) analysis showed that the compounds have three different perovskite structures. Structural characterisation of the samples was evaluated using XRD patterns. Scanning electron microscopy showed that all samples are formed by agglomerated particles. Dielectric properties were evaluated using dielectric permittivity and dielectric losses. Cole-Cole plots show a single semicircle for all materials, indicating that the double perovskites obtained are composed of well conducting grain boundaries and poorly conducting grains.

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“…Dichas bandas son típicas de los óxidos con estructura tipo perovskita, muy similares a otros previamente investigados. Las dos bandas características (a 400 y 600 cm -1 ) se asocian principalmente a los modos antisimétricos F 1 u (triple degeneración) de estiramiento y deformación de los octaedros MnO 6 , que suelen ser los enlaces más fuertes en estas estructuras [45,46]. En este tipo de óxidos mixtos se espera que el comportamiento vibracional sea bastante complejo debido a la presencia de los dos cationes metálicos B y B' de diferentes cargas y tamaños.…”

Section: Espectroscopia Ftirunclassified

Nanoestructura de perovskita doble La2NiMnO6 obtenido por ruta de citrato para supercapacitores

Bavio¹,

Tasca²,

Acosta³

et al. 2018

Matéria (Rio J.)

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RESUMEN En este trabajo se presenta el estudio de la perovskita doble La2NiMnO6 como material de electrodo para supercapacitores. El óxido mixto fue preparado por ruta de precursores citrato (CIT). La muestra fue calcinada 4 horas a 800 ºC. El material fue caracterizado por DRXP, espectroscopía FTIR y microscopía SEM. El comportamiento capacitivo del material fue evaluado mediante voltamperometría cíclica y mediciones galvanostáticas de carga/descarga en medio alcalino y ácido. Los perfiles I/V fueron registrados variando las velocidades de barrido de 10 a 100 mV/s. Las curvas galvanostáticas de carga/descarga se registraron a diferentes densidades de corriente, con valores entre 3 y 17 A/g. Los valores más altos de capacitancia fueron obtenidos en medio alcalino. Se encontraron valores de capacitancia específica de 1681 F/g a una densidad de corriente de 3 A/g, potencia y energía específica de 2903 W/kg y 378 Wh/kg, respectivamente. Mientras que en medio ácido los valores fueron de 492 F/g, 3225 W/kg, 137 Wh/kg de capacitancia, potencia y energía específica, respectivamente. Estos resultados obtenidos permiten considerar a las perovskitas dobles como potenciales materiales de electrodo para supercapacitores.

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IR-spectroscopic characterization of A2BB′O6 perovskites

Cited by 97 publications

References 35 publications

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite

Influence of A-site Cation on Structure and Dielectric Properties in A2DyBiO6 (A=Mg, Ca, Sr, Ba) Double Perovskites

Nanoestructura de perovskita doble La2NiMnO6 obtenido por ruta de citrato para supercapacitores

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IR-spectroscopic characterization of A2BB′O6 perovskites

Cited by 97 publications

References 35 publications

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca2BMoO6 (B = Cr, La, Sm) double perovskite

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca2BMoO6 (B = Cr, La, Sm) double perovskite

Influence of A-site Cation on Structure and Dielectric Properties in A2DyBiO6 (A=Mg, Ca, Sr, Ba) Double Perovskites

Nanoestructura de perovskita doble La2NiMnO6 obtenido por ruta de citrato para supercapacitores

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Product

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Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite

Influence of the B-site cation nature on crystal structure and magnetic properties of Ca₂BMoO₆ (B = Cr, La, Sm) double perovskite