A study of the ceramic membrane Sr(Co[sub 0.8]Fe[sub 0.2])O[sub 2.84] using the Mossbauer effect, x-ray absorption near-edge spectroscopy, and x-ray diffraction
A systematic study has been made of the ceramic membrane Sr(Co[sub 0.8]Fe[sub 0.2])O[sub 2.84] in order to elucidate the role of the transition elements in the oxygen diffusion mechanism. The crystal structure of the compound has been determined by X-ray diffraction measurements. The mixed valent behavior of the Fe ion has been examined by X-ray absorption near edge spectroscopy using synchrotron radiation. The temperature dependence of the mixed valent behavior of the Fe ion has been monitored via the magnetic hyperfine interaction by means of Mossbauer spectroscopy. An analysis of the experimental data has resulted in modeling the location of oxygen vacancies in the compound and possible valance behavior of the Co ion.