Structural, optical, and magnetic properties of NiO/NiFe2O4 nanocomposites

Effect of annealing duration on the structural, optical and magnetic properties of NiO/NiFe2O4 nanocomposites

“…The growing disorder in the NCs with prolonged annealing durations is apparent from the Raman spectra. The peaks falling in the range of 600-1200 cm −1 in all NCs represent the second-order Raman peaks, aligning with the stretching modes of NiO [35]. The two-magnon (2 M) mode ∼1500 cm −1 present in the NCs suggests the occurrence of an AFM background facilitated by Ni 2+ -O 2− -Ni 2+ superexchange interaction [44].…”

“…The two-magnon (2 M) mode ∼1500 cm −1 present in the NCs suggests the occurrence of an AFM background facilitated by Ni 2+ -O 2− -Ni 2+ superexchange interaction [44]. As the annealing duration increased, a notable reduction in the 2 M Raman mode was observed, with the mode nearly disappearing after 10 h. This suggests a diminishing trend in AFM correlations which can be attributed to disorder produced by defects [43] and the existence of secondary phases such as NiFe 2 O 4 and Fe 3 O 4 [35]. The presence of different Raman modes appeared in the NCs are summarized in table 2.…”

“…10-0325) [34]. The other five prominent peaks correspond to the cubic phase of NiO (JCPDS card No.047-1049) [35]. It appears that the NiFe 2 O 4 phase is embedded in the NiO in forming the composite system.…”

Comparative study between oxide/soft ferrite, oxide/hard ferrite, and soft/hard ferrite nanocomposites: structural, electrical, and magnetic properties

“…In addition, one of the most promising magnetic nanoparticles is the M-type barium hexaferrite (BaFe 12 O 19 ), distinguished by its exceptional properties, including strong chemical stability, a high Curie temperature, inexpensive manufacturing costs, resistance to corrosion, and high coercivity [30,31]. Many researchers have published their results on the study of oxide/ferrite [32][33][34][35][36][37], and soft/hard ferrite nanocomposites [38][39][40][41]. Sahu et al [32] synthesized NiO/NiFe 2 O 4 nanocomposites using the wet chemical approach assisted by thermal annealing.…”

“…Many researchers have published their results on the study of oxide/ferrite [32][33][34][35][36][37], and soft/hard ferrite nanocomposites [38][39][40][41]. Sahu et al [32] synthesized NiO/NiFe 2 O 4 nanocomposites using the wet chemical approach assisted by thermal annealing. The thermal annealing caused shape transformation, reduction in grain agglomeration, and decrease of structural disorder in the samples.…”