The XRD patterns of (1−x)NiO/xNiFe2O4 (x = 0.05) nanocomposites sintered at different temperatures.
The TEM and SAED micrographs of samples (a) S1, (b) S3, (c) S5, (d) S6, (c) S7, (d) the HRTEM image for S3.
(a) Room temperature magnetic hysteresis for samples S1 (□), S3 (▽), S5 (△), and S6 (○). (b) Variation of the coercivity (HC) and magnetization (MS) with NiFe2O4 particle size (D NFO). (c) Variation of total anisotropy constant (K eff) with NiFe2O4 particle size (D NFO).
Temperature dependence of ZFC and FC magnetizations at 10 kOe for samples (a) S1, (b) S2, (c) S3, (c) S4, (c) S6, and (d) S7.
Temperature dependence of ZFC and FC magnetizations at different magnetic fields for sample S3.
Field dependence of the transition Tirr, as determined by the separation of ZFC and FC curves for sample S3, showing the AT lines.
Time dependence of the magnetization in applied fields of alternated sign after a ZFC process for sample S3.
The ZFC and FC hysteresis loops measured at 10 K after field cooling in 30 kOe from 350 K for samples (a) S1, (b) S2, (c) S3, (d) S4, (e) S5, and (f) S7.
Cooling field dependence of HC and Ms after field cooling from 350 K for S3.
Temperature dependence of HC (a), HEB (b), and MShift (c) for samples with different crystalline sizes.
The relationship between HEB and MShift for samples (a) S2, (b) S3, (c) S4, and (d) S5.
Description of the synthesis conditions for the NiFe2O4/NiO nanogranular systems and crystalline sizes determined by XRD.
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