Structural properties and Raman spectroscopy of rhombohedral La1−xNaxMnO3 (0.075≤x≤0.15)

Pr3+ doping at the A-site of La0.67Ba0.33MnO3 nanocrystalline material: assessment of the relationship between structural and physical properties and Bean–Rodbell model simulation of disorder effects

“…The band at 410 cm À1 corresponds to the E g -symmetry mode associated to an internal bending mode of the MnO 6 octahedra. These two bands are related to the environment surrounding the MnO 6 octahedra in the ABO 3 perovskite and conrms the formation of perovskite structure, 30,31 which is in agreement with the XRD results.…”

Electrical transport in the ferromagnetic state of silver substituted manganites La1−xAgxMnO3 (x = 0.05 and 0.1)

“…We stress that the effects induced by electron correlations and mass renormalizations by electron-electron interactions are crucial in magnetic systems such as doped manganites. [53][54][55][56][57] It is known that in conventional metals, electronphonon scattering is mathematically identical to conventional impurity scattering and leads to a resistivity proportional to (v F 2 l) À1 where l is the mean free path. The mean free path in this approximation is usually related to the Fermi velocity and is estimated as follows l 5 v F s. We follow the Drude relation, s À1 5 q 0 x p 2 /4p, to obtain the scattering rate R s 5 s À1 .…”

The investigation of structural and vibrational properties and optical behavior of Ti-doped La0.67Ba0.25Ca0.08Mn(1−x)TixO3 (x = 0.00, 0.05 and 0.10) manganites

“…We can remark that the calculated Mn/Ti-O bond lengths from the FTIR spectra are very close to the results obtained from the Rietveld renement. [36][37][38] From Fig. 7, it is observed that a remarkable change in the FTIR occurs, in which the transmission bands associated with the Mn/Ti-O stretching vibration shi from 577.57 cm À1 to 585.49 cm À1 with the increasing value of x and increase in Mn/ Ti-O bond lengths (i.e., decrease in force constant (k)).…”