Studies on charge transport in Al–doped La0.7Ca0.3Mn1−xAlxO3 manganites

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

“…It is well known fact that for higher exponent (n) values, effective magnon scattering and spin fluctuations in manganites are higher. 29 For the present case of wet chemical method grown manganite-manganite heterostructure, n is found to be B3.07 indicating the one magnon scattering phenomenon 28,29 across the LMO/LCMO interface. Fig.…”

“…To understand the charge transport mechanisms responsible for the conduction across the interface, R-T data have been fitted [Fig. 2(b)] using the Zener double exchange (ZDE) polynomial law 28,29 of the form: R (T) = R 0 + R 2 T 2 + R n T n , where R 0 is the residual resistance due to structural and other defects and impurities, R 2 is contributed by electron-electron, electron-phonon and electronmagnon scattering phenomena, R n is the corresponding resistance coefficient and n is the power exponent. It is well known fact that for higher exponent (n) values, effective magnon scattering and spin fluctuations in manganites are higher.…”

Investigation of the structural, electrical, and dielectric properties of La0.5Sm0.2Sr0.3Mn1−xCrxO3 for electrical application

“…The distortion from the ideal perovskite structure was confirmed with the value of the Goldschmidt 23 tolerance factor. where r A , r B and r O are respectively the average ionic radii of the A and B perovskite sites and of the oxygen anion.…”

“…The distortion from the ideal perovskite structure was confirmed with the value of the Goldschmidt 23 tolerance factor.where r A , r B and r O are respectively the average ionic radii of the A and B perovskite sites and of the oxygen anion. In the ideal case ( t = 1), the structure is cubic, for 0.96 < t < 1, rhomboidal distortions occur and for t < 0.96, the distortions are orthorhombic.…”

Fe ion doping effects on structure, magnetic and transport properties of La0.7Ca0.3Mn1−xFexO3 (0≤x≤0.10) thin films on Si substrates

“…To date, many ions (Fe, Ti, Co, Cr, Ni etc.) were doped to substitute the Mn ions in the manganite perovskites and some interesting changes in structure, magnetic and transport properties were observed [8][9][10][11]. Among these substitutions, Fe ion has attracted more attentions as it has almost identical ion size and similar energy level structure with Mn ion [12].…”