Structural and electric properties of La0.7Sr0.25Na0.05Mn0.9Ti0.1O3 ceramics

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

“…The high values of the dielectric constant (e 00 ) observed at low frequencies and especially at high temperatures are also explained on the basis of interfacial/ space polarization due to an inhomogeneous dielectric structure. This behavior is similar to that obtained in [52][53][54]. These inhomogeneities can be porosity and grain structure.…”

Electrical conductivity and dielectric behaviour of nanocrystalline La0.6Gd0.1Sr0.3Mn0.75Si0.25O3

“…It is believed that the interaction between the pairs of Mn 4+ and Mn 3+ ions is responsible for the electrical properties in these manganese oxides. 15 Recently, direct current (dc) and alternating current (ac) transport processes have been investigated in low-hole-doped Ln-based manganite-type perovskites such as La 1Àx Ca x MnO 3 , 16 La 1Àx Sr x MnO 3 , 17 La 1Àx A x Mn 1Ày Fe y O 3 , 18 La 0.7 Sr 0.25 Na 0.05 Mn 0.9 -Ti 0.1 O 3 , 19 La 0.5 Ca 0.5Àx Ag x MnO 3 , 20 Pr 0.67 A 0.33 MnO 3 (ref. 21) and RMnO 3 (R ¼ Eu; Gd; Tb; and Dy), 22 where manganese is in a mixed valence state (Mn 3+ -Mn 4+ ).…”

Critical behavior and its correlation with magnetocaloric effect in La0.7Sr0.25Na0.05Mn(1−)Ti O3 (0≤x≤0.1) manganite oxide

“…The substitution of titanium for manganese, as we have reported elsewhere [15], has modified the local structural parameters such as the Mn-O bond distance and Mn-O-Mn bond angle influencing directly the case of electron hopping between Mn ions. Thus, a modification of ionic-size mismatch as compared with La 0.7 Sr 0.25 Na 0.05 MnO 3 could be estimated by the variance of the B-site cation radius distribution σ 2 .…”