Electrical transport and magnetic properties in La0.67Ca0.33MnO3 and CuFe2O4 composites

Structural and Surface Morphology Studies of La0.67Ba0.33(Mn1−xAlx)O3 Thin Films Prepared by Sol‐Gel Method

“…By increasing the concentration of the doped material, it is seen that the nanoparticle was tight together and the size of particle became smaller. Comparison is shown in Figure 2(a) where it is proven that different types of crystallite can be identified on the composites after doping as shown in Figures 2(b)-2(d) [17]. Figure 3 shows the graph of sample grain size in diameter against the concentration of Al.…”

Synthesis and characterization of La 0.75 Ca 0.15 Sr 0.05 Ba 0.05 MnO 3 –Ni 0.9 Zn 0.1 Fe 2 O 4 multiferroic composites

“…67 [14], LCMO/NiFe 2 O 4 [15][16][17], La 2/3 (Ca 0.6 Ba 0.4 ) 1/3 MnO 3 /NiFe 2 O 4 [18], La 0.7 Sr 0.3 MnO 3 /NiFe 2 O 4 [19], La 0.7 Sr 0.3 MnO 3 / CuFe 2 O 4 [20,21], La 0.7 Sr 0.3 MnO 3 /ZnFe 2 O 4 [22], La 0.67 Ca 0.33 MnO 3 / CuFe 2 O 4 [23], La 0.7 Sr 0.3 MnO 3 /CoFe 2 O 4 [24,25], La 0. 67 [29], La 2/3 Sr 1/3 MnO 3 /BaFe 12 O 19 [30], La 0.7 Sr 0.3 MnO 3 /SrFe 12 O 19 [31], and SrFe 12 O 19 /La 1 À x Ca x MnO 3 [32] with a view to enhance the magnetoresistance because the introduction of high resistivity second phase in the manganites has the barrier effect to the tunneling process and also causes the magnetic disorder near the grain boundary.…”

Fabrication and Properties of La-Manganite/SnO₂ Composites

“…Especially, in the case of x=0.01, it is clearly indicated that the maximum MR stably maintained at 23%. This phenomenon was studied by Tian [8], where the secondary phases were generated to the controlled spin-polarized intergrain tunneling effect, which was utilized by magnetic disorder at LCMO grain boundaries. Therefore, affected by the enhanced magnetic disorder, the magnetic reaction such as spin-polarized and tunneling effect is also strengthened at low external applied magnetic field.…”