Structure and physical properties of the LaBiFe2O6 Perovskite produced by the Modified Pechini Method

ABSTRACT: 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.

• Autores: Jaramillo Palacio, Johny Andrés; Barrera Bello, Elixir William; Munévar Cagigas, Julián Andrés; Arnache Olmos, Oscar Luis; Landínez Téllez, David A.; Roa Rojas, Jairo
• Tipo de recurso: Article of investigation
• Fecha de publicación: 2017
• Institución: Universidad de Antioquia
• Repositorio: Repositorio UdeA
• Idioma: eng
• OAI Identifier: oai:bibliotecadigital.udea.edu.co:10495/10968
• Acceso en línea: http://hdl.handle.net/10495/10968
• Palabra clave: Propiedades físicas; Physical Phenomena; Semiconductores; Semiconductors; Método Pechini modificado; Doble perovskita; Ferromagnético; http://aims.fao.org/aos/agrovoc/c_8e15773e
• Rights: openAccess
• License: Atribución-NoComercial-SinDerivadas 2.5 Colombia