Improved electrical transport properties of polycrystalline La_0.8(Ca_0.12Sr_0.08)MnO₃ ceramics by Ag₂O doping

Abstract

Polycrystalline La0.8(Ca0.12Sr0.08)MnO3:mol%Agx (LCSMO:Agx, x = 0, 0.1, 0.2, 0.3 and 0.4) ceramics were synthesized by the sol–gel technique.

Enhancement of the Magnetotransport Behavior in a Phase-Separated LaAgCaMnO3 Polycrystalline: Unraveling the Role of a Multi-Double-Exchange Mechanism

“…Generally, to probe the sensitivity of the infrared sensor to the temperature in manganite, it is essential to have available materials with a high TCR value. , The TCR % was calculated by the given equation: where ρ and T are the resistivity and temperature, respectively. The LACMO compound exhibits a TCR value equal to 69% K –1 in zero field (Figure ), which is quite high and not reported earlier in the LCMO system. , TCR changes dramatically from 10% K –1 at 200 K to 69% K –1 at 123 K. The presence of the peak at 200 K can be due to the enhanced DE interactions, that is, the presence of multi-DE phenomenon and the conductivity mechanism within the LACMO sample.…”

“…The LACMO compound exhibits a TCR value equal to 69% K −1 in zero field (Figure 7), which is quite high and not reported earlier in the LCMO system. 41,42 TCR changes dramatically from 10% K −1 at 200 K to 69% K −1 at 123 K. The presence of the peak at 200 K can be due to the enhanced DE interactions, that is, the presence of multi-DE phenomenon 43 and the conductivity mechanism 44 within the LACMO sample. Several theoretical models have been proposed to explain the behavior of MR as a function of the applied magnetic field.…”