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Williamson-hall analysis in estimation of crystallite size and lattice strain in Bi1.34Fe0.66Nb1.34O6.35 prepared by the sol-gel method

2020; Elsevier BV; Volume: 263; Linguagem: Inglês

10.1016/j.mseb.2020.114830

1873-4944

Susana Devesa, Aidan P. Rooney, M.P.F. Graça, David Cooper, L.C. Costa,

Multiferroics and related materials

Bi1.34Fe0.66Nb1.34O6.35 powders were prepared by the sol-gel method, through the citrate route, and heat treated at 500 °C. The obtained samples were characterized by X-ray diffraction analysis and by high resolution scanning transmission electron microscopy. An X-ray energy dispersive analysis was also performed. The average crystallite size and lattice strain were studied using the Scherrer's formula and the Williamson-Hall (W-H) analysis, assuming Uniform Deformation Model (UDM), Uniform Deformation Stress Model (UDSM) and Uniform Deformation Energy Density Model (UDEDM). The obtained results revealed that the mean crystallite size and lattice strain estimated from the different analysis were highly correlated.