Structure and Physical Properties of the LaBiFe2O6 Perovskite Produced by the Modified Pechini Method

AUTOR(ES)

Palacio, Johny Andrés Jaramillo, Bello, Elixir William Barrera, Cagigas, Julián Andrés Munévar, Arnache, Oscar, Landínez-Téllez, David A., Roa-Rojas, Jairo

FONTE

Mat. Res.

DATA DE PUBLICAÇÃO

24/07/2017

RESUMO

In this paper the synthesis of the LaBiFe2O6 material by the modified Pechini method is reported. Structural, morphologic, magnetic and optic experimental studies were performed. Rietveld refinement of x-ray diffraction patterns revealed that LaBiFe2O6 crystallizes in an orthorhombic perovskite structure (space group Pnma, # 62). Scanning electron microscopy images showed the nanometric feature of grains. X-ray dispersive spectroscopy permitted to infer the obtaining of the LaBiFe2O6 expected stoichiometry. Results of magnetic susceptibility as a function of temperature and field magnetization evidenced mixed ferromagnetism and superparamagnetism behavior at T=300 K. Mössbauer spectroscopy supported the superparamagnetic and ferromagnetic responses as a result of the nanogranular morphology and anisotropy effects. Spectrum of diffuse reflectance suggest that this material behaves as a semiconductor with energy gap Eg=2.13 eV.

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