Synthesis and properties of nanograined La-Ca-manganite–Ni-ferrite composites

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.…”

Microwave-assisted synthesis of Pr–ZrSiO4, V–ZrSiO4 and Cr–YAlO3 ceramic pigments

“…1 Microwave heating was successfully applied in the solid state synthesis of several oxides of transition metals: Co-Fe, Ni-Fe and Fe-Fe spinels, 2-4 Cr 2 O 3 and Fe 2 O 3 , 4-6 yttrium iron garnet YIG 7 and (La,Sr,Ca)XO 3 perovskites, where X is Cr, 8,9 Co and Fe 10,11 or Mn. 3 In recent times, microwaves are being widely utilized to synthesize oxide nanoparticles and also nanoporous or nanostructured materials by dielectric heating of solutions 12-14 often in hydrothermal conditions. [15][16][17][18][19] At any rate, this route has at the moment little appeal for large-scale production of colorants, so it is not considered in this study.…”