An Infrared Spectroscopic Study of the Insulator–Metal Transition and Charge-Ordering in Rare Earth Manganates, Ln1−xAxMnO3 (Ln=Rare Earth, A=Ca, Sr, Pb)

Synthesis, structural and ferromagnetic properties of La1−x K x MnO3 (0·0 ≤ x ≤ 0·25) phases by solution combustion method

“…These two bands are related to the environment surrounding the MnO 6 octahedra in the ABO 3 perovskite (Arulraj and Rao 1999;Gao et al 2002). These absorptions disappear when x exceeds 0⋅15, on account of the metallic nature of the oxides ( figures 5(d-f)).…”

Effect of the sintering temperature on the properties of nanocrystalline Ca1−xSmxMnO3 (0≤x≤0.4) powders

“…The products resulting from the heat treatments at 1073 and 1473 K present much simpler IR spectra with just two strong bands at ca. 600 and 400 cm −1 characteristics of the perovskite structure [31,32]. These two bands are also visible for the sample heated at 873 K, as expected from X-ray diffractogram.…”

Study of the electrical and dielectric measurements of a rare-earth doped perovskite La0.6Nd0.1Sr0.3Mn0.7Ti0.3O3

“…The infrared spectra of rare earth manganites are characterized by absorption bands due to a stretching mode (m s ) around 600-560 cm -1 involving an internal motion of Mn ion in MnO 6 octahedron and the bending mode (m b ) around 400 cm -1 [24][25][26]. These two bands are related to the environment surrounding (Mn/Ti)O 6 octahedra in the perovskite [27] and may reflect a Jahn-Teller (JT) distortion due to the fact that the JT distortion mainly influences (Mn/Ti)O 6 octahedra, i.e., IR absorption spectrum in this compound is determined principally by the vibration of the BO 6 octahedra. The structure refinement is carried out by Rietveld analysis [28] of X-ray powder diffraction data using the FullProf software (version January 2006-LLB-LCSIM).…”