Assessment of the relationship between magnetotransport and magnetocaloric properties in nano-sized La0.7Ca0.3Mn1−xNixO3 manganites

Possibility of controlling the conduction mechanism by choosing a specific doping element in a praseodymium manganite system

“…In the case of Cr-PCMO compound, the partial replacement of Mn 3+ ions by Cr 3+ ions causes a decrease in the number of hopping electrons and a decline in the available hopping sites between Mn 3+ and Mn 4+ ions which signicantly weakens the double exchange interaction mechanism. Introducing 10% of Cr in Pr 0.7 Ca 0.3 MnO 3 has caused an increase the bond angle hMn-O-Mni ¼160.63 (1). It causes a changes in the unit cell parameters which leads to a slight decrease in the unit cell volume (V ¼ 227.14(3) A 3 ).…”

“…Recent investigations on physical properties of perovskite oxides conrm that rare earth manganites having general formula AMnO 3 (A ¼ rare earth of alkaline earth ions) are good candidates for fundamental physical research. [1][2][3][4][5] It has been shown that manganites present a strong correlation between their structural, transport, optical and magnetic properties. [6][7][8][9][10][11][12][13] Thanks to the multifunctional behavior of manganites, they can be considered as well-qualied for several applications.…”

Evaluation of Zn‐substituted La0.5Sr0.5CoO3 ceramics as functional materials for thick‐film resistors

“…Although the ferrites, iron-or manganese-based perovskite oxides have some appealing electrical properties, the alkaline-earth (AE) element substituted lanthanum cobalt oxide (La 1-x AE x CoO 3 ) manifests more peculiar physicochemical, magnetic, and thermoelectric properties. [15][16][17][18][19][20][21][22][23] Moreover, it was reported that the electrical conductivity of La 1-x Sr x CoO 3 could be greatly enhanced by substituting La 3+ with Sr 2+ and the highest conductivity appeared at around x = 0.5 when sintered in an air atmosphere. 16,[24][25][26] However, the temperature dependence of its resistivity needs further improvement.…”

“…Compared with other synthetic methods (such as melting growth, electrodeposition, combustion method), the solid-state method has more advantages in the broad application of TFRs 23,[29][30][31][32][33][34][35] . Therefore, in this study, Zn 2+ was adopted to partially substitute cobalt ion, and La 3+ was replaced by Sr 2+ .…”