Electrical, thermal and magnetic studies on Bi-substituted LSMO manganites

Effect of Ag substitution on structural, magnetic and magnetocaloric properties of Pr 0.6 Sr 0.4– x Ag x MnO 3 manganites

“…4, the ZFC and FC magnetization curves split below the irreversibility temperature Tirr which is here 284 and 276 K for x=0.05 and 0.1 samples, respectively. This irreversibility between ZFC and FC curves, as observed for similar doped manganites, suggests the presence of magnetic clusters [30] and can also be explained by the magnetic inhomogeneity in the long range ferromagnetic-ordering [31] . We should also note that on lowering temperature, the FC branch increases whereas a decreasing tendency is observed for the ZFC curve.…”

Study of physical properties of the Li0.5MgFe1.5O3.5 ferrite nanoparticles

“…The temperature coefficient of resistance (TCR) is one of the most important parameters for device applications involving infrared (IR) detectors for night vision bolometer technologies, determined by the following expression: 72 where: and T are respectively the resistivity and the absolute temperature.…”

Investigation of magnetic properties and colossal magnetoresistance in nanocrystalline doped manganite

“…bismuth (Bi), it strongly affects the electrical as well as magnetic properties of manganite since it has stable oxidation states. In the past studies, several researchers have reported that, after Bi doping in L 0.6−x Bi x Sr 0.4 MnO 3 (0 ⩽ x ⩽ 0.3) and La 0.67−x Bi x Sr 0.33 MnO 3 (0 ⩽ x ⩽ 0.3) systems, the electrical as well as magnetic properties get influenced and yield high percentage magnetoresistance (MR%) 40%-98% and 28%-99% respectively [13,14]. Another class of manganites with monovalent ion doping (Li, Na, Ag, and K) exhibits similar properties to divalent doped ones, but at half the concentration [15][16][17].…”