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Fig. 1
The FMR/EPR spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at different temperatures. Right panels present spectra in the low temperature range (T < 70 K), left panels in the high temperature range (T > 70 K).
Fig. 2
Experimental (open squares) and fitted (solid lines) magnetic resonance spectra of (a) 1Co,N-TiO2, (b) 5Co,N-TiO2, and (c) 10Co,N-TiO2 nanocomposites at 90 K.
Fig. 3
Experimental FMR spectrum of 10Co,N-TiO2 sample at T = 90 K (open squares) and fitted four components (solid lines designated 1 to 4).
Fig. 4
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 1Co,N-TiO2 nanocomposite.
Fig. 5
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 5Co,N-TiO2 nanocomposite.
Fig. 6
Temperature dependence of FMR parameters (amplitude, resonance field, two types of linewidths) for Callen-type shape components obtained from fittings in 10Co,N-TiO2 nanocomposite.
Fig. 7
Temperature dependence of the integrated intensity of center A (open circles) and B (open squares) in 5Co,N-TiO2 nanocomposite.
Anisotropy fields for centers A and B at high (270 K) and low temperature (5 K).