FTIR and Electrical Study of Dysprosium Doped Cobalt Ferrite Nanoparticles

Table 4

Dielectric constant of CoFe_2−𝑥Dy_𝑥O₄ (𝑥=0.00, 0.05, 0.10, and 0.15) at different sintering temperatures.

Samples	Frequency	Dielectric constant (𝜀^′) at different sintering temperatures
		300°C	500°C	700°C	900°C
𝑥=0.00	75 kHz	180	1127	834	344
	1 MHz	177	1370	1017	385
	5 MHz	173	1559	1143	473
𝑥=0.05	75 kHz	248	391	567	149
	1 MHz	246	273	567	149
	5 MHz	241	242	557	146
𝑥=0.10	75 kHz	495	293	267	220
	1 MHz	297	282	263	220
	5 MHz	276	274	257	216
𝑥=0.15	75 kHz	245	160	183	692
	1 MHz	160	151	180	679
	5 MHz	171	146	183	665