Table 4.

Ms, Mr, and $\chi$ values of the samples through magnetization data analysis.

Sample	Ms (emu/g)	Mr (emu/g)	χ	Magnetic moment (J/T)
Magnetite	30.3	0.23	3.1	6.7 × 10−18
FS1	21.6	0.24	2.6	9.2 × 10−19
FS2	11.5	0.02	1.5	8.9 × 10−19
FS3	10.6	0.02	1.2	8.5 × 10−19
FS4	9.2	0.06	2.0	8.1 × 10−19