The Effect of Oxygen Stoichiometry on Phase Relations and Structure in the System La1-xSrxFeO3-δ (0 ≤ x ≤ 1, 0 ≤ δ ≤ 0.5)

Spectroscopic study of the electric field induced valence change of Fe-defect centers in SrTiO3

“…The MSRD value was obtained from the best fit of the Fe K-edge EXAFS signal for LaFeO 3 using the single-shell Fe-O model with the theoretical phase and amplitude, calculated by the FEFF8 code for the LaFeO 3 structure. 18 While LaFeO 3 is orthorhombic (space group Pnma), the distortion of the Fe-O 6 octahedra is smaller than the measurement uncertainty (B0.005 Å ), and therefore the first shell was treated as a perfect octahedron (R Fe-O = 1.994 AE 0.005 Å ). The good quality of the fit and the small MSRD obtained for the Fe-O bond (s 2 = 0.0033 Å 2 ) in LaFeO 3 confirms the validity of this approach.…”

Role of magnetic exchange energy on charge ordering inR1/3Sr2/3FeOMa1, Yan2, Diallo3 et al. 2011Phys. Rev. B221100View full textAdd to dashboardCite

“…As the ionic size decreases from La to Nd, the RSFO compounds tend to be more oxygen deficient. [9] PSFO and NSFO were annealed under oxygen pressure (10 bar) at 600…”

Charge compensation and magnetic properties in Sr and Cu doped La-Fe perovskites

“…close to -0.1 mm/s and hyperfine field 26 T. This latter state, according to Ref. [11], can be attributed to Fe 5+ . In the Figure 4 the blue and green subspectra correspond to Fe 3+ , the red one to Fe 5+ .…”

“…Doped lanthanum ferrites are widely studied for use in catalysis [1][2][3][4], as cathode materials for solid oxide fuel cells (SOFCs) [5][6][7][8] and in chemical sensors applications [9][10]. Dann et al [11] studied the La 1-x Sr x FeO 3-w system using neutron powder diffraction measurements and Mössbauer spectroscopy. They found that in La 0.8 Sr 0.2 FeO 3-w full oxygen stoichiometry is maintained (w = 0) and the crystal symmetry of the compound is orthorhombic.…”