Size Effects on Magnetic Properties of Ni_0.5Zn_0.5Fe₂O₄ Prepared by Sol-Gel Method

Table 1

Structural and magnetic parameters of Ni_0.5Zn_0.5Fe₂O₄ ferrites from 350 to 1100°C.

𝑇 (°C)	𝐷 (nm)	𝑎 (Å)	(𝜀^2)^1/2×10^−4	𝑀𝑠 (μ B/f.u.)	𝐻𝑐 (Oe)		𝑀𝑟 (μ B/f.u.)
				300 K	300 K	10 K	300 K
350	9	—	—	0.26	0	478	0
400	10	8.3965	—	0.79	3.6	687	0.0017
500	13	8.3922	76.7	1.53	5.6	530	0.0085
600	30	8.3775	13.7	2.03	58.2	114	0.21
700	33	8.3750	13.5	2.77	58.0	—	0.19
800	46	8.3792	10.7	2.87	50.8	117	0.26
900	81	8.3776	1.57	3.12	32.3	—	0.17
1000	88	8.3766	2.15	3.09	25.4	44	0.12
1100	96	8.3774	2.14	3.14	15.1	—	0.06